Full pinout of T28. Signals other than Rx/Tx/Gnd may be varied in other models.
bottom Pin
Name
Direction
Description
1
ATMS
Audio to mobile
2
AFMS/RTS
Audio from mobile/RTS
3
CTS/ONREQ
CTS/Mobile Station On REQuest
4
data in
Data to mobile (Rx)
5
data out
Data from mobile (Tx)
6
ACC in
Accessory control to mobile. Used as Rx in some models (i.e. T68) for flashing.
7
ACC out
Accessory control from mobile/handsfree sense. Used as Tx in some models (i.e. T68) for flashing.
8
AGND
Audio signal ground + 0V reference
9
flash
Flash memory voltage + Service
10
DGND
Digital ground
11
Vcc
DC + for battery charging + External accessory powering
Pins 9 and 11 shorted in flash cable?
Pinout by Cruiser team:
Pin
Signal
Description
1
ATMS
2
AFMS
3
CTS_ON
4
DTMS
5
DFMS
6
CTMS
7
CFMS
8
AGND
9
VPPFLASH
10
DGND
11
DCIO
CTMS stands for Control To Mobile Station; CFMS stands for Control From Mobile Station; DTMS stands for Data To Mobile Station; DFMS stands for Data From Mobile Station
