U3600BM Datasheet, PDF (8/43 Pages) ATMEL Corporation – SINGLE CHIP CORDLESS TELEPHONE IC

Figure 6. Serial Bus Timing Diagram
Data
(D)
A1
A2
A3
D0
Clock
(C)
tsud
thd
tch
tcl teon teh teoff
Content of Internal
Registers
The registers have the following structure
D7
D6
D5
D4
D3
D2
D1
D0
R0: Reference for D/A converter
MUXDA
DA6
DA5
DA4
DA3
DA2
DA1
DA0
MUXDA: D/A multiplexing VBAT / RSSI
DA(0:6): Reference voltage D/A
R1: Gain of earpeace amplifier and demodulator
GEA4
GEA3
GEA2
GEA1
GEA0 GDEM
free
free
GEA[0:4]: Gain of earpeace amplifier; “0” is LSB, “4” is MSB
GDEM: Demodulator gain (1 = low gain)
R2: Switches and mutes for receive and data reception
DATRX BEXP
EEA
ERXO
ERX1 ERXHF
MRX
ERX2
DATRX:
BEXP:
EEA:
ERXO:
ERX1:
ERXHF:
MRX:
ERX2:
Switch data comparator output to “DACO”-pin
Bypass expander
Enable earpiece amplifier
Enable RXO output driver
Enable RX low frequency part 1
Enable Mixer2 and IF-amplifier
Mute RX low frequency path (expander) keeping circuit enabled
Enable RX low frequency part 2 (expander)
R3: Switches and mutes for transmit and power managemant
PDVDD RBAT
free
free
free
free
MTX
ETX
PDVDD:
RBAT:
MTX:
ETX:
Enable pull-down transistor in power-down mode
Battery detection high/low range
Mute TX low frequency path (compressor) keeping circuit enabled
Enable TX low frequency part
8 U3600BM
4516C–CT0–08/02