AT89C5132-ROTUL datasheet(125/182 Pages) ATMEL

tên linh kiện	AT89C5132-ROTUL

Giải thích chi tiết về linh kiện	USB Microcontroller with 64K Bytes Flash Memory

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125

4173E–USB–09/07

AT89C5132

19.3.1

Master Configuration

The SPI operates in master mode when the MSTR bit in SPCON is set.

19.3.2

Slave Configuration

The SPI operates in slave mode when the MSTR bit in SPCON is cleared and data has been

loaded in SPDAT.

19.3.3

Data Exchange

There are two possible Policies to exchange data in master and slave modes:

•

polling

•

interrupts

19.3.4

Master Mode with Polling Policy

Figure 19-9 shows the initialization phase and the transfer phase flows using the polling policy.

Using this flow prevents any overrun error occurrence.

•

The bit rate is selected according to Table 97.

•

The transfer format depends on the slave peripheral.

•

SS may be deasserted between transfers depending also on the slave peripheral.

•

SPIF flag is cleared when reading SPDAT (SPSTA has been read before by the “end of

transfer” check).

This policy provides the fastest effective transmission and is well adapted when communicating

at high speed with other Microcontrollers. However, the procedure may then be interrupted at

any time by higher priority tasks.

AT89C5132-ROTUL bảng dữ liệu(PDF) 125 Page - ATMEL Corporation