hw1: add crystal, more commentary

probably need a crystal for usb :)

still needs footrints, will probably be any old 3225 part.

3 files changed, 247 insertions, 172 deletions

diff --git a/hw1/README b/hw1/README
index 6a5ac53..94807c1 100644
--- a/hw1/README
+++ b/hw1/README
@@ -6,3 +6,11 @@ lines between the two boards are tapped to a 10 pin connector matching
 cheap FX2based logic analysers, allowing automatic tests to be written
 that use sigrok to check that the signals on the wire match expectations.
 
+
+TODO:
+Check i2c conns to target board! (drop the unused one!)
+VCC routing (and recommended mic5504 routing)
+ground pours in kicad
+reshuffle LA conn
+gerber generation?
+
diff --git a/hw1/hw1.kicad_pcb b/hw1/hw1.kicad_pcb
index 9eecfec..8be0496 100644
--- a/hw1/hw1.kicad_pcb
+++ b/hw1/hw1.kicad_pcb
@@ -2,11 +2,11 @@
 
   (general
     (links 71)
-    (no_connects 53)
+    (no_connects 51)
     (area 110.922999 72.949999 179.653001 126.440001)
     (thickness 1.6)
     (drawings 27)
-    (tracks 84)
+    (tracks 88)
     (zones 0)
     (modules 25)
     (nets 25)
@@ -1243,11 +1243,15 @@
   (segment (start 159.905 102.247) (end 156.135 102.247) (width 0.25) (layer F.Cu) (net 5) (tstamp 5A11F07C))
   (segment (start 162.687 105.029) (end 159.905 102.247) (width 0.25) (layer F.Cu) (net 5) (tstamp 5A11F074))
   (segment (start 162.687 119.634) (end 162.687 105.029) (width 0.25) (layer F.Cu) (net 5) (tstamp 5A11F06D))
+  (segment (start 171.958 123.825) (end 171.958 122.936) (width 0.25) (layer F.Cu) (net 6) (status C00000))
+  (segment (start 171.958 122.936) (end 169.037 120.015) (width 0.25) (layer F.Cu) (net 6) (tstamp 5A121551) (status C00000))
   (segment (start 147.435 102.747) (end 149.229 102.747) (width 0.25) (layer F.Cu) (net 6))
   (segment (start 166.497 120.015) (end 169.037 120.015) (width 0.25) (layer B.Cu) (net 6) (tstamp 5A1212D3))
   (segment (start 149.606 103.124) (end 166.497 120.015) (width 0.25) (layer B.Cu) (net 6) (tstamp 5A1212D2))
   (via (at 149.606 103.124) (size 0.6) (drill 0.4) (layers F.Cu B.Cu) (net 6))
   (segment (start 149.229 102.747) (end 149.606 103.124) (width 0.25) (layer F.Cu) (net 6) (tstamp 5A1212CB))
+  (segment (start 174.498 123.825) (end 174.498 122.174) (width 0.25) (layer F.Cu) (net 7) (status 400000))
+  (segment (start 174.498 122.174) (end 172.339 120.015) (width 0.25) (layer F.Cu) (net 7) (tstamp 5A12154C) (status 800000))
   (segment (start 147.435 102.247) (end 150.126 102.247) (width 0.25) (layer F.Cu) (net 7))
   (segment (start 171.069 118.745) (end 172.339 120.015) (width 0.25) (layer B.Cu) (net 7) (tstamp 5A1212F0))
   (segment (start 166.624 118.745) (end 171.069 118.745) (width 0.25) (layer B.Cu) (net 7) (tstamp 5A1212E7))
diff --git a/hw1/hw1.sch b/hw1/hw1.sch
index 991ee21..9f4a6e2 100644
--- a/hw1/hw1.sch
+++ b/hw1/hw1.sch
@@ -242,12 +242,12 @@ Text Notes 9700 1600 0    60   ~ 0
 $Comp
 L STM32L151C6TxA U1
 U 1 1 58CEFE92
-P 4550 4350
-F 0 "U1" H 1050 6075 50  0000 L BNN
-F 1 "STM32L151C6TxA" H 8050 6075 50  0000 R BNN
-F 2 "Housings_QFP:TQFP-48_7x7mm_Pitch0.5mm" H 8050 6025 50  0000 R TNN
-F 3 "" H 4550 4350 50  0000 C CNN
-	1    4550 4350
+P 4950 4500
+F 0 "U1" H 1450 6225 50  0000 L BNN
+F 1 "STM32L151C6TxA" H 8450 6225 50  0000 R BNN
+F 2 "Housings_QFP:TQFP-48_7x7mm_Pitch0.5mm" H 8450 6175 50  0000 R TNN
+F 3 "" H 4950 4500 50  0000 C CNN
+	1    4950 4500
 	1    0    0    -1  
 $EndComp
 $Comp
@@ -264,23 +264,23 @@ $EndComp
 $Comp
 L +3V3 #PWR05
 U 1 1 58CF063D
-P 4500 2350
-F 0 "#PWR05" H 4500 2200 50  0001 C CNN
-F 1 "+3V3" H 4500 2490 50  0000 C CNN
-F 2 "" H 4500 2350 50  0000 C CNN
-F 3 "" H 4500 2350 50  0000 C CNN
-	1    4500 2350
+P 4900 2500
+F 0 "#PWR05" H 4900 2350 50  0001 C CNN
+F 1 "+3V3" H 4900 2640 50  0000 C CNN
+F 2 "" H 4900 2500 50  0000 C CNN
+F 3 "" H 4900 2500 50  0000 C CNN
+	1    4900 2500
 	1    0    0    -1  
 $EndComp
 $Comp
 L GND #PWR06
 U 1 1 58CF077D
-P 4450 6300
-F 0 "#PWR06" H 4450 6050 50  0001 C CNN
-F 1 "GND" H 4450 6150 50  0000 C CNN
-F 2 "" H 4450 6300 50  0000 C CNN
-F 3 "" H 4450 6300 50  0000 C CNN
-	1    4450 6300
+P 4850 6450
+F 0 "#PWR06" H 4850 6200 50  0001 C CNN
+F 1 "GND" H 4850 6300 50  0000 C CNN
+F 2 "" H 4850 6450 50  0000 C CNN
+F 3 "" H 4850 6450 50  0000 C CNN
+	1    4850 6450
 	1    0    0    -1  
 $EndComp
 $Comp
@@ -316,23 +316,23 @@ F 3 "" H 3850 1650 50  0000 C CNN
 	1    3850 1650
 	1    0    0    -1  
 $EndComp
-Text Label 8250 5350 0    60   ~ 0
+Text Label 8650 5500 0    60   ~ 0
 USB_DM
-Text Label 8250 5450 0    60   ~ 0
+Text Label 8650 5600 0    60   ~ 0
 USB_DP
 Text Label 3550 1600 3    60   ~ 0
 USB_DM
 Text Label 3650 1600 3    60   ~ 0
 USB_DP
-Text Label 8250 4650 0    60   ~ 0
+Text Label 8650 4800 0    60   ~ 0
 DAC1_OUT
-Text Label 8250 4750 0    60   ~ 0
+Text Label 8650 4900 0    60   ~ 0
 DAC2_OUT
-Text Label 550  5050 0    60   ~ 0
+Text Label 950  5200 0    60   ~ 0
 I2C_SCL
-Text Label 550  5150 0    60   ~ 0
+Text Label 950  5300 0    60   ~ 0
 I2C_SDA
-Text Notes 5000 2200 0    60   ~ 0
+Text Notes 5400 2350 0    60   ~ 0
 [x] debug via via 6pin\n[  ] debug via 10x5x1.27mm cortex SMD\n
 Text Label 9350 3000 2    60   ~ 0
 I2C_SCL
@@ -426,32 +426,32 @@ Wire Notes Line
 Wire Notes Line
 	10700 1000 10700 500 
 Wire Wire Line
-	4500 2450 4500 2350
+	4900 2600 4900 2500
 Wire Wire Line
-	4350 2450 4650 2450
+	4750 2600 5050 2600
 Wire Wire Line
-	4350 2450 4350 2550
+	4750 2600 4750 2700
 Wire Wire Line
-	4450 2550 4450 2450
-Connection ~ 4450 2450
+	4850 2700 4850 2600
+Connection ~ 4850 2600
 Wire Wire Line
-	4550 2450 4550 2550
-Connection ~ 4500 2450
+	4950 2600 4950 2700
+Connection ~ 4900 2600
 Wire Wire Line
-	4650 2450 4650 2550
-Connection ~ 4550 2450
+	5050 2600 5050 2700
+Connection ~ 4950 2600
 Wire Wire Line
-	4350 6150 4350 6250
+	4750 6300 4750 6400
 Wire Wire Line
-	4350 6250 4650 6250
+	4750 6400 5050 6400
 Wire Wire Line
-	4450 6150 4450 6300
-Connection ~ 4450 6250
+	4850 6300 4850 6450
+Connection ~ 4850 6400
 Wire Wire Line
-	4550 6250 4550 6150
+	4950 6400 4950 6300
 Wire Wire Line
-	4650 6250 4650 6150
-Connection ~ 4550 6250
+	5050 6400 5050 6300
+Connection ~ 4950 6400
 Wire Wire Line
 	1750 1450 1850 1450
 Wire Wire Line
@@ -459,21 +459,21 @@ Wire Wire Line
 Wire Wire Line
 	3850 1550 3850 1650
 Wire Wire Line
-	8150 5350 8250 5350
+	8550 5500 8650 5500
 Wire Wire Line
-	8150 5450 8250 5450
+	8550 5600 8650 5600
 Wire Wire Line
 	3550 1550 3550 1600
 Wire Wire Line
 	3650 1550 3650 1600
 Wire Wire Line
-	8150 4650 8250 4650
+	8550 4800 8650 4800
 Wire Wire Line
-	8150 4750 8250 4750
+	8550 4900 8650 4900
 Wire Wire Line
-	550  5150 950  5150
+	950  5300 1350 5300
 Wire Wire Line
-	950  5050 550  5050
+	1350 5200 950  5200
 Wire Wire Line
 	1750 1050 1800 1050
 Wire Wire Line
@@ -531,12 +531,12 @@ $EndComp
 $Comp
 L +3V3 #PWR010
 U 1 1 58CF46D6
-P 2050 6650
-F 0 "#PWR010" H 2050 6500 50  0001 C CNN
-F 1 "+3V3" H 2050 6790 50  0000 C CNN
-F 2 "" H 2050 6650 50  0000 C CNN
-F 3 "" H 2050 6650 50  0000 C CNN
-	1    2050 6650
+P 2450 6800
+F 0 "#PWR010" H 2450 6650 50  0001 C CNN
+F 1 "+3V3" H 2450 6940 50  0000 C CNN
+F 2 "" H 2450 6800 50  0000 C CNN
+F 3 "" H 2450 6800 50  0000 C CNN
+	1    2450 6800
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
@@ -556,48 +556,48 @@ Connection ~ 2050 7150
 $Comp
 L C C1
 U 1 1 58CF4B65
-P 600 3100
-F 0 "C1" H 625 3200 50  0000 L CNN
-F 1 "100n" H 625 3000 50  0000 L CNN
-F 2 "Capacitors_SMD:C_0603_HandSoldering" H 638 2950 50  0000 C CNN
-F 3 "" H 600 3100 50  0000 C CNN
-	1    600  3100
+P 600 2900
+F 0 "C1" H 625 3000 50  0000 L CNN
+F 1 "100n" H 625 2800 50  0000 L CNN
+F 2 "Capacitors_SMD:C_0603_HandSoldering" H 638 2750 50  0000 C CNN
+F 3 "" H 600 2900 50  0000 C CNN
+	1    600  2900
 	1    0    0    -1  
 $EndComp
 $Comp
 L GND #PWR011
 U 1 1 58CF4BEA
-P 600 3350
-F 0 "#PWR011" H 600 3100 50  0001 C CNN
-F 1 "GND" H 600 3200 50  0000 C CNN
-F 2 "" H 600 3350 50  0000 C CNN
-F 3 "" H 600 3350 50  0000 C CNN
-	1    600  3350
+P 600 3100
+F 0 "#PWR011" H 600 2850 50  0001 C CNN
+F 1 "GND" H 600 2950 50  0000 C CNN
+F 2 "" H 600 3100 50  0000 C CNN
+F 3 "" H 600 3100 50  0000 C CNN
+	1    600  3100
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	950  2950 600  2950
+	1350 3100 600  2750
 Wire Wire Line
-	600  3250 600  3350
-NoConn ~ 950  4250
-NoConn ~ 950  4350
-NoConn ~ 950  4050
-NoConn ~ 950  3950
-NoConn ~ 950  3850
-NoConn ~ 950  4650
+	600  3050 600  3100
+NoConn ~ 1350 4400
+NoConn ~ 1350 4500
+NoConn ~ 1350 4200
+NoConn ~ 1350 4100
+NoConn ~ 1350 4000
+NoConn ~ 1350 4800
 Wire Wire Line
-	950  4550 550  4550
-Text Label 550  4550 0    60   Italic 0
+	1350 4700 950  4700
+Text Label 950  4700 0    60   Italic 0
 SWO
 Wire Wire Line
-	8150 5550 8250 5550
+	8550 5700 8650 5700
 Wire Wire Line
-	8150 5650 8250 5650
-Text Label 8250 5550 0    60   Italic 0
+	8550 5800 8650 5800
+Text Label 8650 5700 0    60   Italic 0
 SWDIO
-Text Label 8250 5650 0    60   Italic 0
+Text Label 8650 5800 0    60   Italic 0
 SWCLK
-Text Label 650  2950 0    60   Italic 0
+Text Label 600  2750 0    60   Italic 0
 NRST
 $Comp
 L PWR_FLAG #FLG012
@@ -662,36 +662,36 @@ NoConn ~ 1250 1450
 Text Notes 1000 1450 0    60   ~ 0
 CLK
 Wire Wire Line
-	8150 4450 8250 4450
+	8550 4600 8650 4600
 Wire Wire Line
-	8150 4550 8250 4550
-Text Label 8250 4450 0    60   ~ 0
+	8550 4700 8650 4700
+Text Label 8650 4600 0    60   ~ 0
 UART_TX_OUT
-Text Label 8250 4550 0    60   ~ 0
+Text Label 8650 4700 0    60   ~ 0
 UART_RX_OUT
 Wire Wire Line
-	950  5450 550  5450
+	1350 5600 950  5600
 Wire Wire Line
-	950  5550 550  5550
+	1350 5700 950  5700
 Wire Wire Line
-	950  5650 550  5650
+	1350 5800 950  5800
 Wire Wire Line
-	950  5750 550  5750
-Text Label 550  5450 0    60   ~ 0
+	1350 5900 950  5900
+Text Label 950  5600 0    60   ~ 0
 SPI_CS
-Text Label 550  5550 0    60   ~ 0
+Text Label 950  5700 0    60   ~ 0
 SPI_SCK
-Text Label 550  5650 0    60   ~ 0
+Text Label 950  5800 0    60   ~ 0
 SPI_MISO
-Text Label 550  5750 0    60   ~ 0
+Text Label 950  5900 0    60   ~ 0
 SPI_MOSI
 Wire Wire Line
-	8150 4850 8250 4850
+	8550 5000 8650 5000
 Wire Wire Line
-	8150 4950 8250 4950
-Text Label 8250 4850 0    60   ~ 0
+	8550 5100 8650 5100
+Text Label 8650 5000 0    60   ~ 0
 ADC_IN1
-Text Label 8250 4950 0    60   ~ 0
+Text Label 8650 5100 0    60   ~ 0
 ADC_IN2
 Text Notes 8500 2700 0    60   ~ 0
 PA4(DAC1)
@@ -762,8 +762,6 @@ F 3 "" H 4850 7000 50  0001 C CNN
 	1    4850 7000
 	1    0    0    -1  
 $EndComp
-NoConn ~ 950  3550
-NoConn ~ 950  3650
 NoConn ~ 3750 1550
 NoConn ~ 4050 1150
 Wire Wire Line
@@ -822,17 +820,17 @@ Text Label 5600 1650 0    60   ~ 0
 SWO
 Text Notes 5200 950  0    60   ~ 0
 STLink compatible debug
-NoConn ~ 8150 4250
-NoConn ~ 8150 4350
-NoConn ~ 8150 5050
-NoConn ~ 8150 5150
-NoConn ~ 8150 5250
-NoConn ~ 8150 5750
-NoConn ~ 950  5350
-NoConn ~ 950  5250
-NoConn ~ 950  4950
-NoConn ~ 950  4850
-NoConn ~ 950  4750
+NoConn ~ 8550 4400
+NoConn ~ 8550 4500
+NoConn ~ 8550 5200
+NoConn ~ 8550 5300
+NoConn ~ 8550 5400
+NoConn ~ 8550 5900
+NoConn ~ 1350 5500
+NoConn ~ 1350 5400
+NoConn ~ 1350 5100
+NoConn ~ 1350 5000
+NoConn ~ 1350 4900
 Text Notes -121300 438350 0    60   ~ 0
 IN/OUT from perspective of HOST\nDUT Nucleo is TARGET
 Text Notes 8950 6350 0    60   ~ 0
@@ -846,75 +844,75 @@ SWDIO
 $Comp
 L R R1
 U 1 1 5A0F8D14
-P 9350 4050
-F 0 "R1" V 9430 4050 50  0000 C CNN
-F 1 "4k7" V 9350 4050 50  0000 C CNN
-F 2 "Resistors_SMD:R_0603_HandSoldering" V 9280 4050 50  0001 C CNN
-F 3 "" H 9350 4050 50  0001 C CNN
-	1    9350 4050
+P 10500 4050
+F 0 "R1" V 10580 4050 50  0000 C CNN
+F 1 "4k7" V 10500 4050 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 10430 4050 50  0001 C CNN
+F 3 "" H 10500 4050 50  0001 C CNN
+	1    10500 4050
 	1    0    0    -1  
 $EndComp
 $Comp
 L R R2
 U 1 1 5A0F8EF5
-P 9650 4050
-F 0 "R2" V 9730 4050 50  0000 C CNN
-F 1 "4k7" V 9650 4050 50  0000 C CNN
-F 2 "Resistors_SMD:R_0603_HandSoldering" V 9580 4050 50  0001 C CNN
-F 3 "" H 9650 4050 50  0001 C CNN
-	1    9650 4050
+P 10800 4050
+F 0 "R2" V 10880 4050 50  0000 C CNN
+F 1 "4k7" V 10800 4050 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 10730 4050 50  0001 C CNN
+F 3 "" H 10800 4050 50  0001 C CNN
+	1    10800 4050
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	9650 3800 9650 3900
+	10800 3800 10800 3900
 Wire Wire Line
-	9350 3800 9650 3800
+	10500 3800 10800 3800
 Wire Wire Line
-	9350 3800 9350 3900
+	10500 3800 10500 3900
 $Comp
 L +3V3 #PWR020
 U 1 1 5A0F90D0
-P 9500 3800
-F 0 "#PWR020" H 9500 3650 50  0001 C CNN
-F 1 "+3V3" H 9500 3940 50  0000 C CNN
-F 2 "" H 9500 3800 50  0000 C CNN
-F 3 "" H 9500 3800 50  0000 C CNN
-	1    9500 3800
+P 10650 3800
+F 0 "#PWR020" H 10650 3650 50  0001 C CNN
+F 1 "+3V3" H 10650 3940 50  0000 C CNN
+F 2 "" H 10650 3800 50  0000 C CNN
+F 3 "" H 10650 3800 50  0000 C CNN
+	1    10650 3800
 	1    0    0    -1  
 $EndComp
 $Comp
 L Jumper_NC_Small JP1
 U 1 1 5A0F91B9
-P 9350 4350
-F 0 "JP1" H 9350 4430 50  0000 C CNN
-F 1 "Jumper_NC_Small" H 9360 4290 50  0000 C CNN
-F 2 "Socket_Strips:Socket_Strip_Straight_2x01_Pitch2.54mm" H 9350 4350 50  0001 C CNN
-F 3 "" H 9350 4350 50  0001 C CNN
-	1    9350 4350
+P 10500 4350
+F 0 "JP1" H 10500 4430 50  0000 C CNN
+F 1 "Jumper_NC_Small" H 10510 4290 50  0000 C CNN
+F 2 "Socket_Strips:Socket_Strip_Straight_2x01_Pitch2.54mm" H 10500 4350 50  0001 C CNN
+F 3 "" H 10500 4350 50  0001 C CNN
+	1    10500 4350
 	0    -1   -1   0   
 $EndComp
 $Comp
 L Jumper_NC_Small JP2
 U 1 1 5A0F9269
-P 9650 4350
-F 0 "JP2" H 9650 4430 50  0000 C CNN
-F 1 "Jumper_NC_Small" H 9660 4290 50  0000 C CNN
-F 2 "Socket_Strips:Socket_Strip_Straight_2x01_Pitch2.54mm" H 9650 4350 50  0001 C CNN
-F 3 "" H 9650 4350 50  0001 C CNN
-	1    9650 4350
+P 10800 4350
+F 0 "JP2" H 10800 4430 50  0000 C CNN
+F 1 "Jumper_NC_Small" H 10810 4290 50  0000 C CNN
+F 2 "Socket_Strips:Socket_Strip_Straight_2x01_Pitch2.54mm" H 10800 4350 50  0001 C CNN
+F 3 "" H 10800 4350 50  0001 C CNN
+	1    10800 4350
 	0    -1   -1   0   
 $EndComp
 Wire Wire Line
-	9350 4200 9350 4250
+	10500 4200 10500 4250
 Wire Wire Line
-	9650 4200 9650 4250
+	10800 4200 10800 4250
 Wire Wire Line
-	9650 4450 9650 4600
+	10800 4450 10800 4600
 Wire Wire Line
-	9350 4450 9350 4600
-Text Label 9350 4600 3    60   ~ 0
+	10500 4450 10500 4600
+Text Label 10500 4600 3    60   ~ 0
 I2C_SDA
-Text Label 9650 4600 3    60   ~ 0
+Text Label 10800 4600 3    60   ~ 0
 I2C_SCL
 Text Notes 600  800  0    60   ~ 0
 Designed for a cheap FX2LA\nto be just "plugged in" for sigrok
@@ -928,36 +926,36 @@ Wire Wire Line
 Wire Wire Line
 	9400 2300 9300 2300
 NoConn ~ 9300 2300
-NoConn ~ 950  4450
-NoConn ~ 950  3150
-Text Notes 1350 3150 0    60   ~ 0
+NoConn ~ 1350 4600
+NoConn ~ 1350 3300
+Text Notes 1750 3300 0    60   ~ 0
 We're using debugger only here
 $Comp
 L C C6
 U 1 1 5A0FB867
-P 700 3800
-F 0 "C6" H 725 3900 50  0000 L CNN
-F 1 "100n" H 725 3700 50  0000 L CNN
-F 2 "Capacitors_SMD:C_0603_HandSoldering" H 738 3650 50  0000 C CNN
-F 3 "" H 700 3800 50  0000 C CNN
-	1    700  3800
+P 800 3200
+F 0 "C6" H 825 3300 50  0000 L CNN
+F 1 "100n" H 825 3100 50  0000 L CNN
+F 2 "Capacitors_SMD:C_0603_HandSoldering" H 838 3050 50  0000 C CNN
+F 3 "" H 800 3200 50  0000 C CNN
+	1    800  3200
 	1    0    0    -1  
 $EndComp
 $Comp
 L GND #PWR021
 U 1 1 5A0FB8D8
-P 700 4000
-F 0 "#PWR021" H 700 3750 50  0001 C CNN
-F 1 "GND" H 700 3850 50  0000 C CNN
-F 2 "" H 700 4000 50  0000 C CNN
-F 3 "" H 700 4000 50  0000 C CNN
-	1    700  4000
+P 800 3400
+F 0 "#PWR021" H 800 3150 50  0001 C CNN
+F 1 "GND" H 800 3250 50  0000 C CNN
+F 2 "" H 800 3400 50  0000 C CNN
+F 3 "" H 800 3400 50  0000 C CNN
+	1    800  3400
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	700  3950 700  4000
-Text Notes -500 3850 0    60   ~ 0
-Don't place this\nI dont' think we need it
+	800  3350 800  3400
+Text Notes -950 3450 0    60   ~ 0
+Not needed on L1, but needed for L4/F3
 Text Notes 9000 3300 0    60   ~ 0
 TODO\n[ ] Route all spare pins to _something_?
 $Comp
@@ -988,11 +986,76 @@ Connection ~ 5400 7500
 Wire Wire Line
 	6100 7200 6100 7000
 Connection ~ 6100 7000
-Connection ~ 9500 3800
+Connection ~ 10650 3800
 Wire Wire Line
-	950  3350 700  3350
+	1350 3500 1100 3500
 Wire Wire Line
-	700  3350 700  3650
-Text Label 950  3350 2    60   ~ 0
+	1100 3500 800  3050
+Text Label 1350 3500 2    60   ~ 0
 VLCD
+Text Notes 5150 2750 0    60   ~ 0
+L1/F303/L4 in qfp48 are all compatible with this layout\n(but f3 needs external pullup on USB-DP)
+$Comp
+L Crystal_GND24_Small Y?
+U 1 1 5A137095
+P 800 3800
+F 0 "Y?" H 850 3975 50  0000 L CNN
+F 1 "Crystal_GND24_Small" H 850 3900 50  0000 L CNN
+F 2 "" H 800 3800 50  0001 C CNN
+F 3 "" H 800 3800 50  0001 C CNN
+	1    800  3800
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	550  3700 1350 3700
+Wire Wire Line
+	1350 3800 1150 3800
+Wire Wire Line
+	1150 3900 1150 3800
+Wire Wire Line
+	750  3900 1150 3900
+$Comp
+L C C?
+U 1 1 5A1373B8
+P 750 4150
+F 0 "C?" H 775 4250 50  0000 L CNN
+F 1 "18pf" H 775 4050 50  0000 L CNN
+F 2 "Capacitors_SMD:C_0603_HandSoldering" H 788 4000 50  0000 C CNN
+F 3 "" H 750 4150 50  0000 C CNN
+	1    750  4150
+	1    0    0    -1  
+$EndComp
+$Comp
+L C C?
+U 1 1 5A137455
+P 550 4150
+F 0 "C?" H 575 4250 50  0000 L CNN
+F 1 "18pf" H 575 4050 50  0000 L CNN
+F 2 "Capacitors_SMD:C_0603_HandSoldering" H 588 4000 50  0000 C CNN
+F 3 "" H 550 4150 50  0000 C CNN
+	1    550  4150
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR?
+U 1 1 5A137592
+P 650 4400
+F 0 "#PWR?" H 650 4150 50  0001 C CNN
+F 1 "GND" H 650 4250 50  0000 C CNN
+F 2 "" H 650 4400 50  0000 C CNN
+F 3 "" H 650 4400 50  0000 C CNN
+	1    650  4400
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	550  4000 550  3700
+Connection ~ 800  3700
+Wire Wire Line
+	650  4400 650  4300
+Wire Wire Line
+	550  4300 750  4300
+Connection ~ 650  4300
+Wire Wire Line
+	750  4000 750  3900
+Connection ~ 800  3900
 $EndSCHEMATC