參數(shù)資料
型號(hào): MR80C52CXXX-20
廠商: TEMIC SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQCC44
文件頁數(shù): 74/170頁
文件大?。?/td> 25028K
代理商: MR80C52CXXX-20
165
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
18. SPI – Serial Peripheral Interface
18.1
Features
Full-duplex, three-wire synchronous data transfer
Master or Slave operation
LSB first or MSB first data transfer
Seven programmable bit rates
End of Transmission Interrupt flag
Write Collision flag protection
Wake-up from Idle mode
Double speed (CK/2) Master SPI mode
18.2
Overview
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
Atmel ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P and peripheral devices or
between several AVR devices.
USART can also be used in Master SPI mode, see ”USART in SPI mode” on page 202.
The Power Reduction SPI bit, PRSPI, in ”PRR0 – Power Reduction Register 0” on page 48 must
be written to zero to enable SPI module.
Figure 18-1. SPI block diagram
Note:
1. Refer to Figure 1-1 on page 2, and Table 14-6 on page 82 for SPI pin placement.
SPI2X
DIVIDER
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