–
U302
MCSI1.CLK
MCSI1.DOUT
MCSI1.SYNC
DATA
CLK
/CS
U100
When U302 is communicating with U100, it works in Master Mode with clock frequency of up to 9.6
MHz. U100 uses MCSI1.CLK as the clock, MCSI1.DOUT as data cable to configure its register, and
MCSI1.SYNC as chip select signal.
MICROWIRE Interface
U302
UWIRE.SDO
UWIRE.SDI
UWIRE.SCLK
MISO
MOSI
SCLK
U231
UWIRE.CS3
/SS
The MICROWIRE interface can accommodate four external devices at most, generally transmitting
control and status messages of external devices, and reading data from ROM. Its maximum clock
frequency is a quarter of system clock frequency. In this case, MICROWIRE is used to configure or
read from the audio processor U231 and requires chip select signal CS3.
Serial peripheral interface (SPI)
SPIF.SCK
SPIF.DOUT
U302
SPIF.CS2
PE
U701
PC
PD
SPI of the processor U302 operates in Master mode, and it is controlled by MPU or DMA. In Master
Mode, U302 can provide four chip select signals, of which CS2 is used to control the Intermediate
Frequency (IF) digital processor U701.
Serial Synchronous Interface (SSI)
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