Siemens SXG 75 Service Repair Documentation page 39

RUIM_M_IO USIM_DATA
RUIM_IO UIM_P_DATA
USB Interface.
The MSM6250 USB signals interface to a USB transceiver on the PM6650
USB_OE USB_OE_TP_N
USB_DAT USB_DAT_VP
USB_SE0 USB_SE0_VM
USB_D_P USN_CONN_D_P
USB_D_M USB_CONN_D_M
/USB_CTL (no connection)
USB_ID (no connection)
USB_VBUS (47K to ground)
Charger Functions.
The PM6650 senses the charger and battery voltages, and charge current, to control the charging
process.
VCHG POWER
ISNS_M ICHARGEOUT
ISNS_P ICHARGE
CHG_CTL CHG_CNT_N
Vbat VBATT
BAT_FET_N BAT_FET
Audio Buffer.
The Audio output from the MSM6250 is amplified to drive the ringer speaker.
SPKR_IN_M AUXO_M
SPKR_IN_P AUXO_P
SPKR_OUT_
SPKR_OUT_M
M
SPKR_OUT_P SPKR_OUT_P
MSM6250 Communication.
Uses a synchronous serial interface.
SBDT PM_SBDT
SBCK PM_SBCK
SBST PM_SBST
MSM_INT PM_INT_N
Logic control.
There are not enough general IO pins on the MSM6250, so some logic control is handled by the
PM6650
/GP1_DRV
/CBL0PWR PA_R0
AMUX_IN1 IRDA_EN
Technical Documentation
TD_Repair_L3_SXG75_R1.0.pdf
SIM signal level shifter interface to MSM6250
SIM signal level shifter interface to SIM Card
USB interface to MSM6250
USB interface to MSM6250
USB interface to MSM6250
USB interface to connector via UART/USB switch
USB interface to connector via UART/USB switch
(not used)
(not used)
(not used)
Charger voltage sense line for charging functions
Charging current sense input
Charging current sense input
Charger transistor control
Battery voltage sense line for charging functions
Battery MOSFET control
Speaker Drive Amp input
Speaker Drive Amp input
Speaker Drive Amp output
Speaker Drive Amp output
Serial Control Bus Data
Serial Control Bus Clock
Serial Control Bus Strobe
Interrupt signal to MSM. Used to initiate comms.
(Not used was GPS regulator enable)
(Not used. Was PA control line)
IrDA transceiver enable.
Company Confidential
2006©BenQ
Release 1.0
01/2006
Page 39 of 73