LG HT353SD - Page 53

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2-44
SCK/SCL 79 I SCK for SPI mode or SCL for I2C mode.
Schmitt-Tr
igger input.
SI/I2C_AD0 82 I SI for SPI mode or Slave Address 0 for I2C mode.
Schmitt-Trigger input.
Internal pull-down resistor
.
/CS/I2C_AD2 83 I Chip selector (CS) for SPI mode or Slave Address 2 for I2C
mode.
Schmitt-Trigger input.
Internal pull-down resistor
.
Special Control Interface
EXT_MUTE 27 I External mute control input. Active High.
Assert ‘HIGH’ to mute audio output.
Internal pull-down resistor
.
OVERLOAD 76 I Power stage overload indication input.
Polarity is programmable. Schmitt-Trigger input.
When OVERLOAD is asserted, all PWM audio outputs go to
“LOW”. That shutdown process is programmable.
Internal pull-down resistor
.
EPD_ENA 77 O External amplifier power device enable output.
Active High.
Test Mode
TEST_MODE1 97 I Test mode selection pin 1.
In normal operation, it should be “LOW” or not connected.
Internal pull-down resistor
.
TEST_MODE2 98 I Test mode selection pin 2.
In normal operation, it should be “LOW” or not connected.
Internal pull-down resistor
.
SCAN_ENA 99 I Scan enable. Active High.
In normal operation, it should be “LOW” or not connected.
Internal pull-down resistor
.
TEST_MODE3 100 I Test mode selection pin 3.
In normal operation, it should be “LOW” or not connected.
Internal pull-down resistor
.
All inputs and bi-directional inputs are 5 Volt tolerant. The corresponding pins can be connected to the buses that can
swing between 0V and 5V. The output-only pins are not 5V tolerant and the buses they are connected to can swing only
between 0V and 3.3V.