HuCard Port
Pins are listed from the short pin on the left (pin 1) to the long pin
on the right (pin 38). 
| Pin # | Signal/Usage |
|---|---|
| 1 | /CARD_DETECT |
| 2 | AUDIO_IN |
| 3 | HuC6280 A19 |
| 4 | HuC6280 A16 |
| 5 | HuC6280 A15 |
| 6 | HuC6280 A12 |
| 7 | HuC6280 A7 |
| 8 | HuC6280 A6 |
| 9 | HuC6280 A5 |
| 10 | HuC6280 A4 |
| 11 | HuC6280 A3 |
| 12 | HuC6280 A2 |
| 13 | HuC6280 A1 |
| 14 | HuC6280 A0 |
| 15 | HuC6280 D0 (D7 for TG16) |
| 16 | HuC6280 D1 (D6 for TG16) |
| 17 | HuC6280 D2 (D5 for TG16) |
| 18 | GND |
| 19 | HuC6280 D3 (D4 for TG16) |
| 20 | HuC6280 D4 (D3 for TG16) |
| 21 | HuC6280 D5 (D2 for TG16) |
| 22 | HuC6280 D6 (D1 for TG16) |
| 23 | HuC6280 D7 (D0 for TG16) |
| 24 | HuC6280 A20 |
| 25 | HuC6280 A10 |
| 26 | HuC6280 /RD |
| 27 | HuC6280 A11 |
| 28 | HuC6280 A9 |
| 29 | HuC6280 A8 |
| 30 | HuC6280 A13 |
| 31 | HuC6280 A14 |
| 32 | HuC6280 A17 |
| 33 | HuC6280 A18 |
| 34 | HuC6280 /WR |
| 35 | HuC6280 HSM (high = 7.15909 MHz, low = 1.7897725 MHz) |
| 36 | /RESET (see circuit below) |
| 37 | HuC6280 /IRQ2 |
| 38 | VCC +5VDC |
The /CARD_DETECT pin is pulled high by a 4.7K ohm resistor (R101) to +5V. This pin is also connected to the expansion port.
Schematic of reset circuit:
wpce-rst.png
The reset signal is held low for approximately 726ms after power is applied, and connects to the HuC6280, HuC6270, HuC6260, HuCard port, and expansion port.