Texas Instruments TRIS TMS37122 - Figure 3: Typical 3 D-AFE Application Including Battery Backup Function

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Analog Front End IC TMS37122 - Reference Guide August ’01
Figure 3: Typical 3D-AFE Application Including Battery Backup Function
The pinning and a description of each of the pins on the TMS37122 is given in Table 1.
Note:
Apart from the test inputs TCLK, TDAT and TEN, the logic inputs do not
have internal pull-down resistors in order to save current. Therefore defined
states from the connected Microcomputer are required. If pins are not used, a
connection to GND is necessary.
CL
VCL
GND
WAKE
VBAT EOBA
GND
UHF TRANSMITTER
WDEENVCCO
VCC
RF1
RF2
RF3
TIMERINT/INP INT/INPOUT
TEST/TRIMMING INTERFACE
TCLK
TDAT
OUT
BATTERY
LR1
CR1
TEN
3-D ANALOG FRONT-END
TMS37122
MICROCOMPUTER
OUT
MOD
LR2LR3
CR3 CR2
TX
OUT
PASSIVE ENTRY/ PASSIVE START TRANSPONDER WITH BATTERY BACKUP FUNCTION
CLKA/M
Dbat