Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 86 LC8.1U LA9.
The following GPIO table can be used for quick reference:
Table 9-1 GPIO Reference Table
This section details the control signal descriptions. The control
signals are classified by their respective functions as follows:
•System
• Audio
• Display
• HDMI
• USB.
9.9.1 System Control Signals
8280_DETECT
The 8280_DETECT signal is used to inform the MT5382 of the
presence of MT8280.
FLASH_WE
The FLASH_WE signal is the write enable signal for the system
flash IC. This signal is hardware-wise write enabled by default
but is put to disabled after it is written with a valid software
image file.
IR
The IR signal is an output from the remote control IR receiver.
This signal is connected in parallel to both MT5382 and
Standby Controller.
KEYBOARD
The KEYBOARD signal is a DC signal from the control board
ladder circuit indicating which key has been pressed.
LED1
The LED1 control signal comes from the Standby Controller
and its function is to control the ON mode LED. The ON mode
LED is "White" in color and represents the status of the system,
where it is “on” only in normal operation. A low signal turns on
the LED, while a high signal turns off the LED.
Device Pin Symbol Function Reference Type Remarks
MT5382 C22 ALIN INT_CEC GPIO46 Input Interrupt Port from Stby Controller
MT5382 A23 AOBCK Reserved GPIO49 N/A Trap(0)
MT5382 B23 AOLRCK Reserved GPIO48 N/A Trap(1)
MT5382 A24 AOMCLK INTERRUPT GPIO47 Input Interrupt Port for BDS Bolt-On
MT5382 D22 AOSDATA0 ANA-DIG_DIM_SELECT GPIO50 Output Analog or Digital Dimming Selection
MT5382 C23 AOSDATA1 LCD_PWR_ON GPIO51 Output Vdisp On/Off Control Signal
MT5382 B24 AOSDATA2 +12VDISP_DETECT GPIO52 Input Display Power Detection
MT5382 A25 AOSDATA3 HEADPHONE_DETECT GPIO53 Input Headphone Detection Indicator
MT5382 B25 AOSDATA4 FLASH_WE GPIO54 Output Serial Flash Write Enable
MT5382 Y5 GPIO6 USB_PWE GPIO6 Output USB Power Enable
MT5382 AA4 GPIO7 USB_OC GPIO7 Input USB Over Current
MT5382 C19 GPIO8 PRST GPIO8 Output MT8280 Power On Reset
MT5382 A20 GPIO9 CHDEC_RESET GPIO9 Output Reset Signal for MT5112
MT5382 B19 GPIO10 PWN GPIO10 Output MT8280 Power Down Mode
MT5382 B18 GPIO11 INT0 GPIO11 Input Interrupt from MT8280
MT5382 A18 GPIO12 8280_DETECT GPIO12 Input MT8280 Detection
MT5382 B17 GPIO13 ANA-DIG_AUD_SELECT GPIO13 Output Gain Selection to Pre-Amp (Reserved)
MT5382 AE1 OWRP2 EDID_WE GPIO39 Output WE for EDID EEPROMs
MT5382 U23 VCXO UART_SELECT GPIO67 Output Service UART Selector (Reserved)
MT5382 C11 PAALE HDMI_HPD_2 GPIO23 Output HDMI Hotplug Detect for HDMI2
MT5382 D11 PACLE DDC_RESET GPIO24 Output DDC Line Reset Signal
MT5382 E11 PARB BACKLIGHT_ON_OFF GPIO21 Output LCD Backlight On/Off Control
MT5382 B9 PDD2 CTRL_DISP1_uP GPIO25 Output Display Control (Reserved)
MT5382 E10 PDD3 CTRL_DISP4_uP GPIO26 Output Display Control (Reserved)
MT5382 D10 PDD4 HDMI_HPD_3 GPIO27 Output HDMI Hotplug Detect for HDMI3
MT5382 C10 PDD5 RESET_PI GPIO28 Output Reset Signal for ProIdiom
MT5382 B10 PDD6 HDMI_RESET GPIO29 Output Reset Signal for Sil9185
MT5382 A10 PDD7 SYS_EEPROM_WE GPIO30 Output WE for System EEPROM
MT5382 E9 POWE HDMI_HPD_1 GPIO22 Output HDMI Hotplug Detect for HDMI1
MT5382 D25 PWM0 Reserved GPIO40 N/A Trap(0)
MT5382 E20 PWM1 PWM_DIMMING GPIO41 Output PWM for Backlight Dimming / Trap(0)
MT5382 D20 PWM2 BACKLIGHT_BOOST GPIO42 Output LCD Backlight Boosting / Trap(0)
MT5382 AB14 OPCTRL0 CEC GPIO200 N/A HDMI CEC Line
MT5382 AC14 OPCTRL1 POWER_DOWN GPIO201 Input Power-down Indicator
MT5382 AD7 OPCTRL2 SDM GPIO202 Input SDM Mode Detection (Startup Only)
MT5382 AC7 OPCTRL3 MUTEn GPIO203 Output Audio Output Muting
MT5382 AD14 OPCTRL4 ANTI_PLOP GPIO204 Output Audio Anti-Plop Control / Trap(1)
MT5382 AC13 OPCTRL5 DC_PROT GPIO205 Input Audio Output DC Protection / Trap(1)
MT5382 E19 ORIO HDMI_HPD_Side GPIO43 Output HDMI Hotplug Detect for HDMI Side
WT61P7 pin 9 GPIOB2 IR Pin 9 Input From IR Receiver
WT61P7 pin 10 GPIOB1 CEC Pin 10 N/A HDMI CEC Line
WT61P7 pin 19 GPIOC0 KEYBOARD Pin 19 Input Key Control (Ladder Circuit) Input
WT61P7 pin 20 DSDA1 SDA Pin 20 N/A Data Line to SDA Bus
WT61P7 pin 21 DSCL1 SCL Pin 21 N/A Clock Line to SCL Bus
WT61P7 pin 24 GPIOA3 LED1 Pin 24 Output Main LED (White) Control
WT61P7 pin 25 GPIOA2 LED2 Pin 25 Output Standby LED (Red) Control
WT61P7 pin 26 GPIOA1 INT_CEC Pin 26 Output Interrupt Output to MT5382
WT61P7 pin 35 GPIOD0 POWER_DOWN Pin 35 Input +12V Detection
WT61P7 pin 41 GPIOE2 STANDBYn Pin 41 Output Power Control Line (Inverted)
To Next Page
Loading...
