參數(shù)資料
型號: MR80C32-36:RD
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, 36 MHz, MICROCONTROLLER, CQCC44
封裝: LCC-44
文件頁數(shù): 76/120頁
文件大小: 25028K
167
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
When the SPI is enabled, the data direction of the MOSI, MISO, SCK, and SS pins is overridden
according to Table 18-1. For more details on automatic port overrides, refer to ”Alternate Port
Note:
1. See ”Alternate Functions of Port B” on page 82 for a detailed description of how to define the
direction of the user defined SPI pins.
The following code examples show how to initialize the SPI as a Master and how to perform a
simple transmission. DDR_SPI in the examples must be replaced by the actual Data Direction
Register controlling the SPI pins. DD_MOSI, DD_MISO and DD_SCK must be replaced by the
actual data direction bits for these pins. For example, if MOSI is placed on pin PB5, replace
DD_MOSI with DDB5 and DDR_SPI with DDRB.
Table 18-1.
SPI pin overrides
Pin
Direction, Master SPI
Direction, Slave SPI
MOSI
User Defined
Input
MISO
Input
User Defined
SCK
User Defined
Input
SS
User Defined
Input
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