User Manual

Confidential
USERS MANUAL
31(41)
Document number Revision
4/198 17-LXE 108 566 Uen PA6
3.2.1 VPPFLASH/DCD
This signal, located on pin 23 in the system connector, can be used by the application
to enable flashing of the phone module. To enter flash-mode, the application shall set
VPPFLASH_EN active high, then enable the MODULE_PWR_EN_B pin.
VREF
30, RD (DFMS)
25, CTS
1 - 100k
VCC
RxD
CTS
Phone Module
Application
VREF
27, TD (DTMS)
28, RTS
26, DTR
1 - 100k
VREF
TxD
RTS
DTR
VREF
23, VPPFLASH/DCD
1 - 100k
VCC
DCD
100k
VREF
VPPFLASH_EN
1 - 100k
VREF