Tait TM8100 mobiles Service Manual page 92

Figure 3.12 Block diagram of the interface circuitry
+13V8 BATT
AGND
Power
Supply
+3V3
+13V8 SW
AUX GPI2
AUX GPI3
CH ON OFF
ITF IOP GPIO7
AUD ITF SPK+
AUD ITF SPK-
ITF VOL WIP DC
AGND
CODEC
ITF CH MIC AUD
and
CDC RX AUD
Audio ITF RX BEEP IN
CDCAUDTAP OUT
ITF AUD TAP IN
ITF AUX MIC AUD
CDC RSSI
ITF ON OFF
ITF CH RXD
DIG CH TXD
ITF CH HOOK
ITF CH PTT
ITF CH GPI1
DIG CH GPO1
ITF CH SPI DI
DIG CH SPI DO
DIG CH SPI CLK
DIG CH LE
Digital
Board
ITF IOP GPIO1-6
ITF IOP GPIO7
ITF IOP RXD
DIG IOP TXD
ITF AUX RXD
DIG AUX TXD
ITF AUX GPI1
ITF AUX GPI2
ITF AUX GPI3
DGND
ITF AUX GPI4-7
DIG AUX GPO4-7
Debug
AGND
Connector
Frequency
AGND
Synthesizer
Receiver
AGND
and
Transmitter
92 Circuit Descriptions
Interface
PTT and
Hookswitch
Decode
I/O
Combine
+3V3
Clamp
I/O
Combine
and
Pull-up
Resistors
+5V
5 V
Regulator
Signal Types:
digital
RF
analog asynchronous serial data
synchronous serial data
clock
EMC
Filters
EMC
Filters
ESD and
EMC
Filters
ESD and
EMC
Filters
EMC
Filters
Clamps
and
Pull-up
Resistors
+3V3 CL
Clamps,
ESD
Filters,
and
EMC
Filters
© Tait Electronics Limited November 2007
+13V8 BATT
AGND
Power
SPK+
Connector
SPK–
+13V8 BATT
+3V3
AGND
DGND
SPK+
SPK–
VOL WIP DC
CH MIC AUD
RX AUD
Control-
Head
Connector
CH ON OFF
CH RXD
CH TXD
CH PTT
CH GPIO1
CH SPI DI
CH SPI DO
CH SPI CLK
CH LE
RX AUD
RX BEEP IN
AUD TAP OUT
AUD TAP IN
AUX MIC AUD
RSSI
Internal
+13V8 SW
Options
IOP GPIO1-6 Connector
IOP GPIO7
IOP RXD
IOP TXD
AGND
DGND
AUX RXD
AUX TXD
AUX GPI1
AUX GPI2
AUX GPI3
AGND
+13V8 SW
AUX GPIO4-7
Auxiliary
Connector
AUD TAP OUT
AUD TAP IN
AUX MIC AUD
RSSI
TM8100/TM8200 Service Manual