Siemens SXG 75 Service Repair Documentation page 33

Interface signals are:
Signal
SLEEP_CLK
A_RDS_DATA_EXIST
I2C_SDA
I2C_SCL
A_FM_STANDBY
FM_RADIO_AUXIP
FM_RADIO_AUXIN
FM radio interface signals
Technical Documentation
TD_Repair_L3_SXG75_R1.0.pdf
Function
32.768MHz clock from PM6650. Used as master clock for FM system.
Logic output from FM radio.
Provides an interrupt signal to MSM6250. The radio takes this line low for
10ms to indicate that it has new RDS data, or that some other action is
required by the MSM6250.
I2C data to configure the radio and to transfer RDS data. I2C address is
0010000 (FM radio part), and 0010001 (RDS part).
I2C clock.
Logic input from MSM6250.
This disables the I2C interface when held low. This is required (in addition
to configuring internal registers) to put the device into a minimum-current
Standby mode.
Audio out (left channel). Fed to AUXIP audio input on MSM6250.
Audio out (right channel). Fed to AUXIN audio input on MSM6250.
Company Confidential
2006©BenQ
Release 1.0
01/2006
Page 33 of 73