CS22250 Datasheet, PDF (14/32 Pages) Cirrus Logic – WIRELESS 10BT CONTROLLER

BBAS
NBBCS
TXPAPE
TXPE
RXPEBB
BBSCLK
BBSDX
SYNTHLE
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.
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’.
Output
Radio power amplifier power enable is a software controlled output. This
signal is used to gate power to the power amplifier.
Output
Radio transmit power enable indicates if transmit mode is enabled. When
low, this signal indicates receive mode.
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.
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.
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.
Output
Synthesizer latch enable is an active high signal used to send data to the
synthesizer. (Use with modular Cresta II Modular Radio only).
CS22250 Wireless 10BT Controller
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DS551PP2 Rev. 3.0