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¡ Semiconductor

MSM7575

FUNCTIONAL DESCRIPTION

Control Registers

(1) CR0 (Basic operating mode)

A/

m SEL

Initial Value

CR0

MCK SEL

PDN ALL

PDN TX

PDN RX

—

LNR

PDN

SAO/AOUT

0

0000000

B7

B6

B5

B4

B3

B2

B1

B0

Note) "Initial": Reset state by PDN/RESET

B7 ...PCM Companding law select:

0/

µ-law, 1/A-law

B6 ...Master clock frequency select:

0/9.600 MHz, 1/19.200 MHz

B5 ...Power down (whole system):

0/Power on, 1/Power down

When using this data for power down control, pin PDN/RESET should be set at

“H”level. The control registers are not reset by this signal.

B4 ...Power down (Transmit only):

0/Power on, 1/Power down

B3 ...Power down (Receive only including the op-amps of GSX3, GSX4 and comparator): 0/

Power on, 1/Power down

B2 ...Not used

B1 ...PCM interface linear code select:

0/Companding law selected by CR0-B7

1/14-bit Linear code (2's complement) in spite of the value of CR0-B7

B0 ...Power Down for Sounder output amps: (SAO), or Receiver output amp (AOUT, VFRO ):

When this data is set to digital “1”, the circut which is not selected by CR4-B5 are at the

power down state.

When this data is set to digital "0", sounder amplifiers and receiver amplifiers are in the

power-on state.