Sony Ericsson GR47/GR48 - Manual (Page 8)

2. GR47/GR48 RADIO DEVICES
8
LZT 123 7589 R1A
.
Figure 2.1 Main Blocks in a Wireless System (embedded application)
Figure 2.2 Main Blocks in a Wireless System (external micro-controller)
In accordance with the recommendations of ITU-T (International
Telecommunication Union - Telecommunications Standardisation Sector)
V.24, the TE communicates with the MS over a serial interface.
SIM
MS
POWER
SUPPLY
GR47 / GR48
GSM
ENGINE
DCE DTE
STATUS &
RESPONSE
‘AT’ COMMAND
CONTROL
EMBEDDED
APPLICATION
SYSTEM
CONN
EC
TOR
GSM NETWORK
SIM
MS
POWER
SUPPLY
GR47 / GR48
GSM
ENGINE
DCE DTE
SYSTEM
CONN
EC
TOR
GSM NETWORK
DTE
EXTERNAL
APPLICATION
MS STATUS &
RESPONSE
‘AT’ COMMAND
CONTROL M