Features
- Raspberry Pi Pico
- All pins brought to header
- Pin marking on rear
- VGA (1:2:1 - R:G:B)
- PS/2 Keyboard
- 5V to keyboard with voltage translator
- SD Card
- Full size card
- Up to 32GB
- Stereo audio
- 16-bit GPIO
- MCP23017 port expander
- I2C1
- 2x20 0.1" pitch header
- Jumper selectable terminators
- Power options
- 5V power input via USB B or 0.1" pitch header
- 3.3V output header
- 120mmx70mm outline
- (4) 6-32 Mounting holes
Pin Marking on Rear
Schematic
Connectors
GP
|
FUNCTION
|
PICO PIN
|
GP6
|
AUDIO-L
|
9
|
GP7
|
AUDIO-R
|
10
|
GND
|
AUDIO-GND
|
8
|
3.3V
|
PS2_3.3V
|
|
VSYS
|
PS2_5V
|
39
|
GP8
|
PS2_CLK
|
11
|
GP9
|
PS2_DATA
|
12
|
GND
|
PS2_GND
|
13
|
3.3V
|
SD_3.3V
|
|
GP12
|
SD_MISO
|
16
|
GP11
|
SD_MOSI
|
15
|
GP10
|
SD_SCK
|
14
|
GP13
|
SD_SLVSEL
|
17
|
GND
|
SD_GND
|
18
|
GP18
|
VGA_BLU
|
24
|
GND
|
VGA_GND
|
23
|
GP20
|
VGA_GRN_HI
|
26
|
GP19
|
VGA_GRN_LO
|
25
|
GP16
|
VGA_HSYNC
|
21
|
GP21
|
VGA_RED
|
27
|
GP17
|
VGA_VSYNC
|
22
|
H1 - 3.3V Power
SD Card
Pico Connectors
GPIO
File:PiPicoMite01 J6 GPIO.PNG
Audio
PS/2 Keyboard
5V Distribution
VGA
Prototype
- Runs PicoMite (MaxiMite) BASIC (VGA, PS/2)
- Uses cards
- Pinouts
Cabling
FUNCTION
|
GP
|
PICO PIN
|
CARD
|
SIG
|
PIN
|
COLOUR
|
AUDIO-L
|
GP6
|
9
|
GRID49
|
AUD-L
|
C1
|
VIO
|
AUDIO-R
|
GP7
|
10
|
GRID49
|
AUD-GND
|
D1
|
BLK
|
AUDIO-GND
|
GND
|
8
|
GRID49
|
AUD-R
|
E1
|
YEL
|
PS2_3.3V
|
3.3V
|
|
|
3.3V
|
4
|
RED
|
PS2_5V
|
VSYS
|
39
|
|
PWR1
|
2
|
ORG
|
PS2_CLK
|
GP8
|
11
|
|
CLK1
|
6
|
VIO
|
PS2_DATA
|
GP9
|
12
|
|
DAT1
|
8
|
YEL
|
PS2_GND
|
GND
|
13
|
|
GND
|
10
|
BLK
|
SD_3.3V
|
3.3V
|
|
|
3.3V
|
7
|
RED
|
SD_MISO
|
GP12
|
16
|
|
MISO
|
2
|
YEL
|
SD_MOSI
|
GP11
|
15
|
|
MOSI
|
4
|
BLU
|
SD_SCK
|
GP10
|
14
|
|
SCLK
|
|
VIO
|
SD_SLVSEL
|
GP13
|
17
|
|
-SDCS
|
|
GRY
|
SD_GND
|
GND
|
18
|
|
GND
|
|
BLK
|
VGA_BLU
|
GP18
|
24
|
VGA
|
B4 (R12=270)
|
12
|
BLU
|
VGA_GND
|
GND
|
23
|
VGA
|
GND
|
19
|
GRN
|
VGA_GRN_HI
|
GP20
|
26
|
VGA
|
G5 (R6=390)
|
6
|
GRN
|
VGA_GRN_LO
|
GP19
|
25
|
VGA
|
G4 (R7=820)
|
7
|
GRN
|
VGA_HSYNC
|
GP16
|
21
|
VGA
|
HS
|
17
|
GRY
|
VGA_RED
|
GP21
|
27
|
VGA
|
R4 (R1=270)
|
1
|
ORG
|
VGA_VSYNC
|
GP17
|
22
|
VGA
|
VS
|
18
|
WHT
|
VGAX49
- VGAX49
- Resistors Values
- Selected for 0.7V output on analog RGB pins
|
R,B
|
|
G RES
|
|
G
|
Rs
|
75
|
|
R1
|
390
|
75
|
Rm
|
270
|
|
R2
|
820
|
264.298
|
Vin
|
3.3
|
|
RM
|
264.298
|
3.3
|
Vout
|
0.717
|
|
|
|
0.729
|
I (mA)
|
9.57
|
|
I (mA)
|
|
9.73
|
PS2X49
SD CARD X49
GRID49
- C1 = Audio_In-L
- D1 - GND
- E1 - Audio_In-R
Mechanicals
Assembly Sheet
PicoMite01 Rev1 Assembly Sheet