Tidy-ups.

) Rewired audio block to pico
) Clarified meaning of USB power jumper and gave better
warning about not plugging in power when jumper fitted.
) We can refer to components now our sheet numbers don't change - note
Q801 on powersupply sheet

Author: thejpster

Kicad/io_exp.sch

@@ -103,7 +103,7 @@ Text Label 6575 3850 0    50   ~ 0
 ~CS7
 Wire Bus Line
 	6925 4050 7050 4050
-Text HLabel 5625 2125 2    50   Input ~ 0
+Text HLabel 5625 2100 2    50   Input ~ 0
 ~IRQ[0..7]
 Entry Wire Line
 	5500 2150 5400 2250
@@ -154,7 +154,7 @@ Text Label 5150 2850 0    50   ~ 0
 Text Label 5150 2950 0    50   ~ 0
 ~IRQ7
 Wire Bus Line
-	5500 2125 5625 2125
+	5500 2100 5625 2100
 $Comp
 L 74xx:74HC245 U1002
 U 1 1 60F0F5AC
@@ -346,8 +346,10 @@ Wire Wire Line
 Connection ~ 7900 2700
 Wire Wire Line
 	7900 2700 7900 2750
+Text Notes 8150 2950 0    50   ~ 0
+Decoupling. Place one near U1001\nPin 9, and one near U1002 Pin 20.
 Wire Bus Line
-	5500 2125 5500 2850
+	5500 2100 5500 2850
 Wire Bus Line
 	6925 3250 6925 4050
 $EndSCHEMATC

Kicad/neotron-pico.sch

@@ -20,11 +20,11 @@ F0 "Audio" 50
 F1 "audio.sch" 50
 F2 "I2C_SDA" B L 6000 2500 50 
 F3 "I2C_SCL" I L 6000 2600 50 
-F4 "AUDIO_DAC_DAT" I L 6000 2000 50 
-F5 "AUDIO_DAC_LR" B L 6000 2100 50 
-F6 "AUDIO_BIT_CLK" B L 6000 2200 50 
-F7 "AUDIO_ADC_DATA" O L 6000 2300 50 
-F8 "AUDIO_ADC_LR" B L 6000 2400 50 
+F4 "AUDIO_DAC_DAT" I L 6000 2400 50 
+F5 "AUDIO_DAC_LR" B L 6000 2300 50 
+F6 "AUDIO_BIT_CLK" B L 6000 2000 50 
+F7 "AUDIO_ADC_DATA" O L 6000 2200 50 
+F8 "AUDIO_ADC_LR" B L 6000 2100 50 
 $EndSheet
 $Comp
 L Mechanical:MountingHole_Pad H102
@@ -212,8 +212,8 @@ Text Notes 500  5950 0    100  Italic 20
 micro-ATX Mounting Holes
 Wire Notes Line
 	4450 5750 4450 7800
-Text Notes 850  725  0    100  Italic 20
-Common Sub-systems
+Text Notes 525  700  0    100  Italic 20
+Top Level Schematic
 Wire Notes Line
 	500  5750 11200 5750
 Text Notes 4450 5950 0    100  Italic 20
@@ -838,8 +838,8 @@ F2 "DC_ON" I L 8750 2350 50
 $EndSheet
 Wire Wire Line
 	3025 1625 3550 1625
-Text Notes 1800 1050 0    50   ~ 0
-The micro-AB USB port will supply 5V.\nDo not plug the Pico into a USB Host\nwith the USB_PWR jumper fitted!
+Text Notes 1500 1150 0    50   Italic 0
+WARNING: Do not plug the Pico into a\nUSB Host with the USB_PWR jumper\nfitted. The micro-AB USB port will\nsupply 5V!
 $Comp
 L Device:Jumper_NO_Small JP101
 U 1 1 606B6D4F
@@ -869,8 +869,6 @@ Text Label 3075 2525 0    50   ~ 0
 NoConn ~ 3025 1925
 NoConn ~ 3025 1825
 NoConn ~ 3025 2025
-Wire Wire Line
-	3025 2425 3500 2425
 Wire Wire Line
 	3025 2525 3500 2525
 Wire Wire Line
@@ -1019,44 +1017,18 @@ Wire Wire Line
 	4550 1275 4075 1275
 Wire Wire Line
 	4550 1375 4075 1375
-Wire Wire Line
-	3025 2125 3500 2125
-Wire Wire Line
-	3025 2325 3500 2325
-Wire Wire Line
-	3025 2625 3500 2625
-Wire Wire Line
-	6000 2000 5525 2000
-Wire Wire Line
-	6000 2100 5525 2100
-Wire Wire Line
-	6000 2200 5525 2200
-Wire Wire Line
-	6000 2300 5525 2300
-Wire Wire Line
-	6000 2400 5525 2400
 Wire Wire Line
 	6000 2500 5525 2500
 Wire Wire Line
 	6000 2600 5525 2600
-Text Label 5950 2200 2    50   ~ 0
-I2S_BCLK
-Text Label 5950 2100 2    50   ~ 0
-I2S_LRCLK
-Text Label 5950 2000 2    50   ~ 0
-I2S_DAC_DATA
-Text Label 5950 2400 2    50   ~ 0
-I2S_LRCLK
-Text Label 5950 2300 2    50   ~ 0
-I2S_ADC_DATA
 Wire Wire Line
 	3925 2825 3925 3225
 Wire Wire Line
 	3925 3225 4125 3225
 Wire Wire Line
 	3025 2825 3925 2825
 Text Label 3075 2825 0    50   ~ 0
-OUTPUT_EN
+~OUTPUT_EN
 Text Label 5300 2925 0    50   ~ 0
 ~CS[0..7]
 Text Label 5300 3025 0    50   ~ 0
@@ -1732,7 +1704,7 @@ L Connector:Conn_01x06_Male J105
 U 1 1 607E546B
 P 9925 3525
 F 0 "J105" H 9897 3407 50  0000 R CNN
-F 1 "Conn_01x06_Male" H 9897 3498 50  0000 R CNN
+F 1 "Conn_01x06_Pins" H 9897 3498 50  0000 R CNN
 F 2 "Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical" H 9925 3525 50  0001 C CNN
 F 3 "~" H 9925 3525 50  0001 C CNN
 	1    9925 3525
@@ -1790,8 +1762,39 @@ Wire Wire Line
 	9700 3750 9700 3725
 Text Notes 4200 1775 0    50   ~ 0
 We use BMC_I2C\nfor VGA DDC
-Text Notes 4575 2200 0    50   ~ 0
+Text Notes 5125 1950 0    50   ~ 0
 LRCLK and BCLK go\nfrom Pico to CODEC
+Wire Wire Line
+	3025 2125 4275 2125
+Wire Wire Line
+	4275 2000 4275 2125
+Wire Wire Line
+	4275 2000 6000 2000
+Wire Wire Line
+	4375 2325 4375 2100
+Wire Wire Line
+	4375 2100 5850 2100
+Wire Wire Line
+	3025 2325 4375 2325
+Wire Wire Line
+	5850 2300 5850 2100
+Wire Wire Line
+	5850 2300 6000 2300
+Connection ~ 5850 2100
+Wire Wire Line
+	5850 2100 6000 2100
+Wire Wire Line
+	4475 2425 4475 2200
+Wire Wire Line
+	3025 2425 4475 2425
+Wire Wire Line
+	4475 2200 6000 2200
+Wire Wire Line
+	4650 2625 4650 2400
+Wire Wire Line
+	4650 2400 6000 2400
+Wire Wire Line
+	3025 2625 4650 2625
 Wire Bus Line
 	1050 2675 1050 3025
 Wire Bus Line

Kicad/powersupply.sch

@@ -583,7 +583,7 @@ F 7 "Stackpole" H 1550 5900 50  0001 C CNN "Manufacturer"
 	0    1    -1   0   
 $EndComp
 Text Notes 2800 6500 0    50   Italic 0
-~SHDN~ must be low at power-up\nto avoid DC-DC enabling temporarily.\n\n~SHDN~ raised to +VDC when DC_ON\nis high enough to switch on Qx01\n(above about 0.7V). 3.3V is plenty.
+~SHDN~ must be low at power-up\nto avoid DC-DC enabling temporarily.\n\n~SHDN~ raised to +VDC when DC_ON\nis high enough to switch on Q801\n(above about 0.7V). 3.3V is plenty.
 $Comp
 L Device:R R802
 U 1 1 607A18C2

Kicad/sdcard.sch

@@ -3,7 +3,7 @@ EELAYER 30 0
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 7 11
+Sheet 3 11
 Title "Neotron Common Hardware - SD Card Slot"
 Date "2021-04-17"
 Rev "[Uncontrolled]"
@@ -169,32 +169,32 @@ $EndComp
 $Comp
 L Device:C C302
 U 1 1 5FE86138
-P 8700 3750
-F 0 "C302" H 8815 3796 50  0000 L CNN
-F 1 "100n" H 8815 3705 50  0000 L CNN
-F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 8738 3600 50  0001 C CNN
-F 3 "~" H 8700 3750 50  0001 C CNN
-F 4 "0" H 8700 3750 50  0001 C CNN "DNP"
-F 5 "BC1150CT-ND" H 8700 3750 50  0001 C CNN "Digikey"
-F 6 "K104K15X7RF5TL2" H 8700 3750 50  0001 C CNN "MPN"
-F 7 "Vishay" H 8700 3750 50  0001 C CNN "Manufacturer"
-F 8 "594-K104K15X7RF5TL2" H 8700 3750 50  0001 C CNN "Mouser"
-	1    8700 3750
+P 8800 3750
+F 0 "C302" H 8915 3796 50  0000 L CNN
+F 1 "100n" H 8915 3705 50  0000 L CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 8838 3600 50  0001 C CNN
+F 3 "~" H 8800 3750 50  0001 C CNN
+F 4 "0" H 8800 3750 50  0001 C CNN "DNP"
+F 5 "BC1150CT-ND" H 8800 3750 50  0001 C CNN "Digikey"
+F 6 "K104K15X7RF5TL2" H 8800 3750 50  0001 C CNN "MPN"
+F 7 "Vishay" H 8800 3750 50  0001 C CNN "Manufacturer"
+F 8 "594-K104K15X7RF5TL2" H 8800 3750 50  0001 C CNN "Mouser"
+	1    8800 3750
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
 	8250 3500 8250 3550
 Wire Wire Line
-	8250 3550 8700 3550
+	8250 3550 8800 3550
 Wire Wire Line
-	8700 3550 8700 3600
+	8800 3550 8800 3600
 Connection ~ 8250 3550
 Wire Wire Line
 	8250 3550 8250 3600
 Wire Wire Line
-	8700 3900 8700 3950
+	8800 3900 8800 3950
 Wire Wire Line
-	8700 3950 8250 3950
+	8800 3950 8250 3950
 Wire Wire Line
 	8250 3950 8250 3900
 Wire Wire Line