Difference between revisions of "Circuit Diagrams"
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+ | == Schematic == | ||
+ | |||
+ | The Issue 2B (rev 1) schematic can be downloaded [https://gitlab.com/thesmog358/tbblue/-/raw/master/docs/schematics/specnext-schematics.pdf?inline=false here]. | ||
+ | |||
== J13 - Daughter board connector == | == J13 - Daughter board connector == | ||
{| width=100% | {| width=100% | ||
− | |valign=top width=50%| [[Image: | + | |valign=top width=50%| [[Image:DaughterLocation.jpg]] |
− | |valign=top| [[Image:Circuit_daughter_board. | + | |valign=top| [[Image:Circuit_daughter_board.png]] |
|} | |} | ||
Line 12: | Line 16: | ||
{| width=100% | {| width=100% | ||
|valign=top width=50%| [[Image:NEXT_GPIO_location.jpg]] | |valign=top width=50%| [[Image:NEXT_GPIO_location.jpg]] | ||
− | |valign=top| [[Image:NEXT_GPIO. | + | |valign=top width=50%| [[Image:NEXT_GPIO.png|461px]] |
|} | |} | ||
<br/> | <br/> | ||
− | == Expansion bus (edge connector) == | + | == CN5 - Expansion bus (edge connector) == |
{| width=100% | {| width=100% | ||
|valign=top width=50%| [[Image:Expansion_bus_location.jpg]] | |valign=top width=50%| [[Image:Expansion_bus_location.jpg]] | ||
− | |valign=top| [[Image:Expansion_bus.jpg]] | + | |valign=top| [[Image:Expansion_bus.png|461px]] |
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == J10/J11 - Memory Expansion Ports == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:Mem_Expansion_location.jpg]] | ||
+ | |valign=top| [[Image:Mem_Expansion.png|461px]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == J4/J7 J8/J14 - Joystick Ports == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:Joystick_Ports_Location.jpg]] | ||
+ | |valign=top| [[Image:Joystick_Ports.png]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == CN1 - VGA Video Port == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:Video_Port_Location.jpg]] | ||
+ | |valign=top| [[Image:Video_Port.png]] | ||
+ | |} | ||
+ | |||
+ | Notes: | ||
+ | * In VGA mode (scandoubler enabled), H-SYNC and V-SYNC are carried separately on their respective pins. | ||
+ | * In RGB mode (scandoubler disabled), H-SYNC carries composite sync, and V-SYNC carries 1. | ||
+ | * Pin 14 carries 3V3, which can be connected to SCART pin 16 to indicate RGB to the display. | ||
+ | * There is no convenient source of voltages between 9.5-12V to indicate 4:3 aspect ratio to the display on SCART pin 8, so this is usually left unconnected. | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == CN8 - Digital Port == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%|[[Image:Digital Port Location.jpg]] | ||
+ | |valign=top| [[Image:Next Digital Port.png]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == CN2/CN6/CN7 - SD Reader (Mainboard) (CN6 on reverse) == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:SD_Reader_Port_Location.jpg]] | ||
+ | |valign=top| [[Image:SD_Reader_Main.png]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == CN10/CN11/CN12 - SD Reader (Daughterboard) (CN12 on reverse) == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:SD_Reader_Daughter_Port_Location.jpg]] | ||
+ | |valign=top| [[Image:SD_Reader.png]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == Accelerator Board == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:Accelerator_Port_Location.jpg]] | ||
+ | |valign=top| [[Image:Accelerator_Port.png]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == Real Time Clock (RTC) == | ||
+ | |||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:RTC_Port_Location.jpg]] | ||
+ | |valign=top| [[Image:RTC_Port.png]] | ||
+ | |} | ||
+ | |||
+ | <br/> | ||
+ | |||
+ | == CN9 - ESP8266-01/RS-232 Port == | ||
+ | {| width=100% | ||
+ | |valign=top width=50%| [[Image:Video_Port_Location.jpg]] | ||
+ | |valign=top| [[Image:Next_ESP_Port.png]] | ||
|} | |} | ||
<br/> | <br/> |
Revision as of 21:45, 3 May 2020
Contents
- 1 Schematic
- 2 J13 - Daughter board connector
- 3 J15 - Next GPIO
- 4 CN5 - Expansion bus (edge connector)
- 5 J10/J11 - Memory Expansion Ports
- 6 J4/J7 J8/J14 - Joystick Ports
- 7 CN1 - VGA Video Port
- 8 CN8 - Digital Port
- 9 CN2/CN6/CN7 - SD Reader (Mainboard) (CN6 on reverse)
- 10 CN10/CN11/CN12 - SD Reader (Daughterboard) (CN12 on reverse)
- 11 Accelerator Board
- 12 Real Time Clock (RTC)
- 13 CN9 - ESP8266-01/RS-232 Port
Schematic
The Issue 2B (rev 1) schematic can be downloaded here.
J13 - Daughter board connector
J15 - Next GPIO
CN5 - Expansion bus (edge connector)
J10/J11 - Memory Expansion Ports
J4/J7 J8/J14 - Joystick Ports
CN1 - VGA Video Port
Notes:
- In VGA mode (scandoubler enabled), H-SYNC and V-SYNC are carried separately on their respective pins.
- In RGB mode (scandoubler disabled), H-SYNC carries composite sync, and V-SYNC carries 1.
- Pin 14 carries 3V3, which can be connected to SCART pin 16 to indicate RGB to the display.
- There is no convenient source of voltages between 9.5-12V to indicate 4:3 aspect ratio to the display on SCART pin 8, so this is usually left unconnected.
CN8 - Digital Port
CN2/CN6/CN7 - SD Reader (Mainboard) (CN6 on reverse)
CN10/CN11/CN12 - SD Reader (Daughterboard) (CN12 on reverse)
Accelerator Board
Real Time Clock (RTC)
CN9 - ESP8266-01/RS-232 Port