CS22250 datasheet(14/32 Pages) CIRRUS

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CS22250 Wireless 10BT Controller

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DS551PP2

Rev. 3.0

www.cirrus.com

BBAS

Output

Baseband address strobe is used to envelop the address or the data on

the BBSDX bus. A logic 1 envelops the address and a logic 0 envelops

the data. This signal has to be setup to the rising edge of BBSCLK for

the baseband processor and is driven on falling edge of BBSCLK.

NBBCS

Output

Baseband chip select is an active low output to activate the serial control

port. When inactive, the SD, BBSCLK, BBAS and BBRNW signals are

‘don’t cares’.

TXPAPE

Output

Radio power amplifier power enable is a software controlled output. This

signal is used to gate power to the power amplifier.

TXPE

Output

Radio transmit power enable indicates if transmit mode is enabled. When

low, this signal indicates receive mode.

RXPEBB

Output

Baseband receive power enable is an output that indicates if the MAC is

in receive mode. A output signal to baseband processor enables receive

mode in baseband processor.

BBSCLK

Output

Baseband serial clock is a programmable output generated by dividing

ARM_CLK by 14 (default). This clock is used for the serial control port to

sample the control and data signals.

BBSDX

Bi-directional

Baseband serial data is a bi-directional serial data bus, which is used to

transfer address and data to/from the internal registers of the baseband

processor.

SYNTHLE

Output

Synthesizer latchenable is anactivehighsignal usedtosend datato the

synthesizer. (Use with modular Cresta II Modular Radio only).

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