Ces informations sont tirées des sources de l'émulateur POSE 3.5.
| Bit | Fonction |
| 0 | (L) USB Chip Select # |
| 1 | (L) SDRAM Control - SDWE# |
| 2 | (L) SDRAM Control - SDRAS# |
| 3 | (L) SDRAM Control - SDCAS# |
| 4 | (L) SDRAM Control - SDCS# |
| 5 | (L) Radio in-service signal |
| 6 | (L) Alarm LED (= 1 -> LED ON) |
| 7 | (P) Unfiltered Sound PWM |
| Bit | Fonction |
| 0 | (L) Mono LCD Data Bit 0 |
| 1 | (L) Mono LCD Data Bit 1 |
| 2 | (L) Mono LCD Data Bit 2 |
| 3 | (L) Mono LCD Data Bit 3 |
| 4 | (L) Mono LCD Frame Pulse |
| 5 | (L) Mono LCD Line Pulse |
| 6 | (L) Mono LCD CLK |
| 7 | (L) Enable the LCD controller |
| Bit | Fonction |
| 0 | (H) Keyboard Column 0 (aka INT0) |
| 1 | (H) Keyboard Column 1 (aka INT1) |
| 2 | (H) Keyboard Column 2 (aka INT2) |
| 3 | (H) Keyboard Column 3 (aka INT3) |
| 4 | (L) HotSync/Dock Button (aka IRQ1) |
| 5 | (-) SPI #1, slot , SD/MMC Card Detect E0R |
| Wake EOR Ready (aka IRQ2) | |
| 6 | (L) USB Interrupt (aka IRQ3) |
| 7 | (L) Power Fail interrupt (aka IRQ6) |
| Bit | Fonction |
| 0 | (L) SPI TXD |
| 1 | (L) SPI RXD |
| 2 | (L) SPI Clock |
| 3 | (L) Radio ready (XDR on radio) |
| 4 | (H) RXD1# (used by Radio) |
| 5 | (H) TXD1# (used by Radio) |
| 6 | (L) RTS1# |
| 7 | (L) CTS1# |
| Bit | Fonction |
| 0 | (P) LCD Contrast |
| 1 | (L) Pen Interrupt, Pen IO (IRQ5) |
| 2 | (-) Free (CLKO) |
| 3 | (P) A20 |
| 4 | (P) A21 |
| 5 | (-) A22 |
| 6 | (L) DTR to radio (XER on radio) |
| 7 | (L) Mass ROM chip select |
| Bit | Fonction |
| 0 | (L) LCD VCC control |
| 1 | (L) EL_ON (= 1 -> LCD BackLight ON) |
| 2 | (L) ADC_CS# (old ID_DETECT#) |
| 3 | (L) 232_SHDN# = 1 -> Serial port ON for UART 1 |
| 4 | (H) USB_SPND |
| 5 | (H) ADC_CS# |
| 6 | (-) Unused6 |
| 7 | (-) Unused6 |
| Bit | Fonction |
| 0 | (L) Radio RSSI 3 |
| 1 | (L) Radio RSSI 2 |
| 2 | (L) Radio RSSI 1 |
| 3 | (L) Radio Power State |
| 4 | (L) RXD2# |
| 5 | (L) TXD2# |
| 6 | (L) RTS2# |
| 7 | (L) CTS2# |
| Bit | Fonction |
| 0 | (L) Radio power on/off |
| 1 | (-) LCD_DISP_ON (RW#) (= 1 -> LCD ON) |
| 2 | (-) AC_PWR# (LDS#) |
| (old (L) Charging Enable) | |
| 3 | (-) Free 3 |
| 4 | (-) VIBE_EN (= 1 -> vibrator ON) |
| (Old (L) Radio Carrier Detect) | |
| 5 | (H) Keyboard Row 0 |
| 6 | (H) Keyboard Row 1 |
| 7 | (H) Keyboard Row 2 |
| Bit | Fonction |
| 0 | (-) SDCLK |
| 1 | (-) SDCE |
| 2 | (-) SDDQMH |
| 3 | (-) SDDQML |
| 4 | (-) SDA10 |
| 5 | (L) Infrared Shut-down (UART 2) (= 1 -> port IrDa OFF) |
| (L) Voltage Translator shutdown (UART 2) | |
| 6 | (-) Unused6 |
| 7 | (-) Unused7 |