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SPI S3C2440A RISC MICROPROCESSOR
22-2
BLOCK DIAGRAM
8bit Prescaler 1
PCLK
Status Register 1
Prescaler Register 1
/SS
nSS 0
SCK
SPICLK 0
MOSI
SPIMOSI 0
MISO
SPIMISO 0
Pin Control Logic 0
MSTR
Tx 8bit Shift Reg 0
Rx 8bit Shift Reg 0
LSB
MSB LSB
MSB
8
8
Clock
SPI Clock
(Master)
CPOL
CPHA
CLOCK
Logic 0
MULF
DCOL
REDY
APB I/F 0
(INT DMA 0)
Master
Slave
Slave
Master
Slave
Slave
Master
Data
Bus
INT 0 / INT 1
REQ0 / REQ1
ACK0 / ACK1
/SS
nSS 1
SCK
SPICLK 1
MOSI
SPIMOSI 1
MISO
SPIMISO 1
Pin Control Logic 1
MSTR
Tx 8bit Shift Reg 1
Rx 8bit Shift Reg 1
LSB
MSB LSB
MSB
8
8
Clock
SPI Clock
(Master)
CPOL
CPHA
CLOCK
Logic 1
MULF
DCOL
REDY
APB I/F 1
(INT DMA 1)
Master
Slave
Slave
Master
Slave
Slave
Master
INT 0 / INT 1
REQ0 / REQ1
ACK0 / ACK1
8bit Prescaler 0
PCLK
Status Register 0
Prescaler Register 0
Figure 22-1 SPI Block Diagram