Difference between revisions of "PiPicoMite01"

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[[file:PiPicoMite01_P1_VGA.PNG]]
 
[[file:PiPicoMite01_P1_VGA.PNG]]
 +
 +
== Prototype ==
 +
 +
==== Running PicoMite (MaxiMite) BASIC (VGA, PS/2) ====
 +
 +
* Uses cards
 +
** [[VGAX49]]
 +
** [[PS2X49]]
 +
** [[SD CARD X49]]
 +
** [[GRID49]]
 +
* Pinouts
 +
 +
===== Cabling =====
 +
 +
{| class="wikitable"
 +
! 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
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| 3.3V
 +
|
 +
|
 +
| 3.3V
 +
| 4
 +
| RED
 +
|-
 +
| PS2_5V
 +
| VSYS
 +
| 39
 +
|
 +
| PWR1
 +
| 2
 +
| ORG
 +
|-
 +
| PS2_CLK
 +
| GP8
 +
| 11
 +
|
 +
| CLK1
 +
| 6
 +
| VIO
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|-
 +
| PS2_DATA
 +
| GP9
 +
| 12
 +
|
 +
| DAT1
 +
| 8
 +
| YEL
 +
|-
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| PS2_GND
 +
| GND
 +
| 13
 +
|
 +
| GND
 +
| 10
 +
| BLK
 +
|-
 +
| SD_3.3V
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| 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
 +
| 12
 +
| BLU
 +
|-
 +
| VGA_GND
 +
| GND
 +
| 23
 +
| VGA
 +
| GND
 +
| 19
 +
| GRN
 +
|-
 +
| VGA_GRN_HI
 +
| GP20
 +
| 26
 +
| VGA
 +
| G5
 +
| 6
 +
| GRN
 +
|-
 +
| VGA_GRN_LO
 +
| GP19
 +
| 25
 +
| VGA
 +
| G4
 +
| 7
 +
| GRN
 +
|-
 +
| VGA_HSYNC
 +
| GP16
 +
| 21
 +
| VGA
 +
| HS
 +
| 17
 +
| GRY
 +
|-
 +
| VGA_RED
 +
| GP21
 +
| 27
 +
| VGA
 +
| R4
 +
| 1
 +
| ORG
 +
|-
 +
| VGA_VSYNC
 +
| GP17
 +
| 22
 +
| VGA
 +
| VS
 +
| 18
 +
| WHT
 +
|-
 +
|}
 +
 +
===== VGAX49 =====
 +
 +
[[FILE:VGAX49_P901-cropped-720px.jpg]]
 +
 +
* [[VGAX49]]
 +
* Resistors Values
 +
** Selected for 0.7V output on analog RGB pins
 +
 +
{| class="wikitable"
 +
!
 +
! 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 =====
 +
 +
[[FILE:PS2X49_P897_cropped_512pxV.jpg]]
 +
 +
* [[PS2X49]]
 +
 +
===== SD CARD X49 =====
 +
 +
[[FILE:SDCARDX49_P935_cropped-512px.jpg]]
 +
 +
* [[SD CARD X49]]
 +
 +
===== GRID49 =====
 +
 +
[[FILE:GRID49_WIRING.PNG]]
 +
 +
* [[GRID49]]
 +
* Audio filter circuit
 +
 +
[[FILE:PiceMite_VGA_Audio.PNG]]
 +
 +
* C1 = Audio_In-L
 +
* D1 - GND
 +
* E1 - Audio_In-R
 +
  
 
== Mechanicals ==
 
== Mechanicals ==

Revision as of 15:54, 16 May 2022

PiPicoMite01 FRONT 3D.png

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
    • 3.5mm jack
  • 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

PiPicoMite01 REAR 3D.png

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

PiPicoMite01 H1 3p3V.PNG

SD Card

PiPicoMite01 J1 SD Card.PNG

Pico Connectors

PiPicoMite01 J4-5 PiPico.PNG

GPIO

File:PiPicoMite01 J6 GPIO.PNG

Audio

PiPicoMite01 J7 Audio.PNG

PS/2 Keyboard

PiPicoMite01 J8 Keyboard.PNG

5V Distribution

PiPicoMite01 J9 5V.PNG

VGA

PiPicoMite01 P1 VGA.PNG

Prototype

Running PicoMite (MaxiMite) BASIC (VGA, PS/2)

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 12 BLU
VGA_GND GND 23 VGA GND 19 GRN
VGA_GRN_HI GP20 26 VGA G5 6 GRN
VGA_GRN_LO GP19 25 VGA G4 7 GRN
VGA_HSYNC GP16 21 VGA HS 17 GRY
VGA_RED GP21 27 VGA R4 1 ORG
VGA_VSYNC GP17 22 VGA VS 18 WHT
VGAX49

VGAX49 P901-cropped-720px.jpg

  • 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

PS2X49 P897 cropped 512pxV.jpg

SD CARD X49

SDCARDX49 P935 cropped-512px.jpg

GRID49

GRID49 WIRING.PNG

PiceMite VGA Audio.PNG

  • C1 = Audio_In-L
  • D1 - GND
  • E1 - Audio_In-R


Mechanicals

PicoMite01 Rev1 Mechs.PNG

Assembly Sheet

PicoMite01 Rev1 Assembly Sheet

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