List of known GPIOs of the AS090 ebook-reader. Also fits mostly to other readers from the ES600/ES900 family from Qisda.
| GPIO | Component | Function |
|---|---|---|
| GPA0 | B3? | |
| GPA1 | ALC5624 | RESET |
| GPA2 | NC | |
| GPA3 | NC | |
| GPA4 | NC | |
| GPA5 | NC | |
| GPA6 | NC | |
| GPA7 | NC | |
| GPA8 | NC | |
| GPA9 | NC | |
| GPA10 | F10? | |
| GPA11 | non existent | |
| GPA12 | S3C2416 | nRCS1 |
| GPA13 | NC | |
| GPA14 | NC | |
| GPA15 | C1? | |
| GPA16 | G6? | |
| GPA17 | S3C2416 | FCLE |
| GPA18 | S3C2416 | FALE |
| GPA19 | S3C2416 | nFWE |
| GPA20 | S3C2416 | nFRE |
| GPA21 | S3C2416 | nFCE? according to schematic |
| GPA22 | S3C2416 | nFCE? according to 2416 datasheet |
| GPA23 | NC | |
| GPA24 | NC | |
| GPA25 | TP3? | |
| GPA26 | TP4? | |
| GPB0 | BQ24075 | EN2 |
| GPB1 | TCON | SLEEP |
| GPB2 | TCON | nBUSY |
| GPB3 | TCON | PWREN |
| GPB4 | BQ24075 | EN1 |
| GPB5 | BQ24075 | nCE |
| GPB6 | S3C2416 | RTCK |
| GPB7 | non existent | |
| GPB8 | non existent | |
| GPB9 | ??S3C2416? | ??USB20_EN?? |
| GPB10 | MIC9404 regulator | AUDIO_SW |
| GPC0 | TCON/S3C2416 | SYS_OE |
| GPC1 | TCON/S3C2416 | SYS_WR |
| GPC2 | TCON/S3C2416 | SYS_CS0 |
| GPC3 | AS090 | SMARTCARD_POWER |
| GPC4 | TCON/S3C2416 | SYS_RS |
| GPC5 | S3C2416 | IROM-Bootmode or nLED2 |
| GPC6 | S3C2416 | IROM-Bootmode or nLED4 |
| GPC7 | S3C2416 | IROM-Bootmode or nLED8 |
| GPC8 | TCON/S3C2416 | DBUS0 |
| GPC9 | TCON/S3C2416 | DBUS1 |
| GPC10 | TCON/S3C2416 | DBUS2 |
| GPC11 | TCON/S3C2416 | DBUS3 |
| GPC12 | TCON/S3C2416 | DBUS4 |
| GPC13 | TCON/S3C2416 | DBUS5 |
| GPC14 | TCON/S3C2416 | DBUS6 |
| GPC15 | TCON/S3C2416 | DBUS7 |
| GPD0 | TCON/S3C2416 | DBUS8 |
| GPD1 | TCON/S3C2416 | DBUS9 |
| GPD2 | TCON/S3C2416 | DBUS10 |
| GPD3 | TCON/S3C2416 | DBUS11 |
| GPD4 | TCON/S3C2416 | DBUS12 |
| GPD5 | TCON/S3C2416 | DBUS13 |
| GPD6 | TCON/S3C2416 | DBUS14 |
| GPD7 | TCON/S3C2416 | DBUS15 |
| GPD8 | WIFI | nRST |
| GPD9 | TCON | nRST |
| GPD10 | GPIO-TILT | SENSOR2 |
| GPD11 | GPIO-TILT | SENSOR1 |
| GPD12 | TPS650240 | MODE |
| GPD13 | ES600 | USB_ID |
| GPD14 | ES600 | PWREN_SD |
| GPD15 | GPIO-TILT | EN |
| GPE0 | S3C2416 | I2SLRCK |
| GPE1 | S3C2416 | I2SSCLK |
| GPE2 | S3C2416 | CDCLK |
| GPE3 | S3C2416 | I2SSDI |
| GPE4 | S3C2416 | I2SSDO |
| GPE5 | S3C2416 | SD0_CLK |
| GPE6 | S3C2416 | SD0_CMD |
| GPE7 | S3C2416 | SD0_DAT0 |
| GPE8 | S3C2416 | SD0_DAT1 |
| GPE9 | S3C2416 | SD0_DAT2 |
| GPE10 | S3C2416 | SD0_DAT3 |
| GPE11 | S3C2416 | SPIMISO |
| GPE12 | S3C2416 | SPIMOSI |
| GPE13 | S3C2416 | SPICLK |
| GPE14 | S3C2416 | I2CSCL |
| GPE15 | S3C2416 | I2CSDA |
| GPF0 | ES600 | KEY_POWER / S_WAKEUP |
| GPF1 | ES600 | nCD_SD1 |
| GPF2 | AUOTOUCH | TP_INT |
| GPF3 | WIFI | SPI_INT |
| GPF4 | ES600 | INT_EARDET |
| GPF5 | AUOTOUCH | TOUCH_EN/RESET |
| GPF6 | BQ24075 | CHG_STA |
| GPF7 | AS090 | KEY_PAGE_DOWN |
| GPG0 | ES600 | P_KEEP |
| GPG1 | ES600 | VBUS_IN_STA |
| GPG2 | AS090 | KEY_MENU |
| GPG3 | AS090 | KEY_RETURN |
| GPG4 | WIFI | WLAN_MAC_wake |
| GPG5 | TPS650240 | POWER_FAIL |
| GPG6 | AS090 | KEY_FUNCTION |
| GPG7 | AS090 | KEY_PAGE_UP |
| GPH0 | S3C2416 | TXD0 |
| GPH1 | S3C2416 | RXD0 |
| GPH2 | S3C2416 | TXD1->SMARTCARD |
| GPH3 | S3C2416 | RXD1->SMARTCARD |
| GPH4 | AS090 | KEY_VOL+ |
| GPH5 | AS090 | KEY_VOL- |
| GPH6 | ES600 | TXD3 / SPISEL (spi multiplexer) |
| GPH7 | ES600 | RXD3 |
| GPH8 | AS090 | 3G_W_DISABLE |
| GPH9 | AS090 | 3G_RESET |
| GPH10 | ES600 | HP_POP_MUTE |
| GPH11 | AS090 | 3G_EN |
| GPH12 | WIFI | PA_3V3 |
| GPH13 | TPS650240 | PMU_DVS (DEFDCDC3) |
| GPH14 | TPS650240 | USB20_EN (EN_LDO) |
| GPK0 | NC | |
| GPK1 | AS090 | VERSION-X |
| GPK2 | AS090 | VERSION-X |
| GPK3 | AS090 | VERSION-X |
| GPK4 | AS090 | VERSION4 |
| GPK5 | WIFI | EN3V3 (G9093) |
| GPK6 | WIFI | EN1V8 (G9093) |
| GPK7 | AS090 | VERSION5 |
| GPK8 | NC | |
| GPK9 | H17 | |
| GPK10 | F19 | |
| GPK11 | NC | |
| GPK12 | NC | |
| GPK13 | NC | |
| GPK14 | NC | |
| GPK15 | NC | |
| GPL0 | S3C2416 | SD1_DAT3 |
| GPL1 | S3C2416 | SD1_DAT3 |
| GPL2 | S3C2416 | SD1_DAT3 |
| GPL3 | S3C2416 | SD1_DAT3 |
| GPL4 | non existent | |
| GPL5 | non existent | |
| GPL6 | non existent | |
| GPL7 | non existent | |
| GPL8 | S3C2416 | SD1_CMD |
| GPL9 | S3C2416 | SD1_CLK |
| GPL10 | non existent | |
| GPL11 | non existent | |
| GPL12 | non existent | |
| GPL13 | S3C2416 | SPI-SS0 |
| GPM0 | NC | |
| GPM1 | S3C2416 | FRnB |