Rainbow Electronics AT75C310 - Manual (Page 101)

AT75C310
101
SPI: Serial Peripheral Interface
The serial peripheral interface provides communication
with external devices in master or slave mode. It also allows communication with external processors or serial
Flash.
Figure 21. SPI Block Diagram
Note: 1. After a hardware reset, the SPI pins NPCS[3:1] are not enabled by default and must be programmed via the PIO A controller.
Table 20. SPI Interface Pins
Pin Name Description Mode Function
MISO Master In/Slave Out Master
Slave
Serial data input to SPI
Serial data output from SPI
MOSI Master Out/Slave In
Master
Slave
Serial data output from SPI
Serial data input to SPI
SPCK Serial Clock
Master
Slave
Clock output from SPI
Clock input to SPI
NPCSS Peripheral Chip Select/
Slave Select
Master
Master
Slave
Output: Selects peripheral
Input: Low causes mode fault
Input: Chip select for SPI
NPCS[3:1] Peripheral Chip Selects Master Extra selects
Serial Peripheral Interface
APB
ACLK
ACLK/32
MISO MISO
MOSI MOSI
SPCK SPCK
NPCSS NPCSS
NPCS1 NPCS1
INT
Advanced
Interrupt Controller
NPCS2
NPCS3
NPCS2
NPCS3