參數(shù)資料
型號: AT89C5131A-PUTIM
廠商: Atmel
文件頁數(shù): 173/176頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K USB 32QFN
標準包裝: 260
系列: AT89C513x
核心處理器: C52X2
芯體尺寸: 8-位
速度: 48MHz
連通性: I²C,SPI,UART/USART,USB
外圍設(shè)備: LED,POR,PWM,WDT
輸入/輸出數(shù): 18
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-VQFN 裸露焊盤
包裝: 托盤
配用: AT89STK-10-ND - KIT EVAL APPL MASS STORAGE
AT89STK-05-ND - KIT STARTER FOR AT89C5131
95
AT89C5131
4136C–USB–04/05
Figure 45. SPI Interrupt Requests Generation
Registers
There are three registers in the module that provide control, status and data storage
functions. These registers are describes in the following paragraphs.
Serial Peripheral Control
Register (SPCON)
The Serial Peripheral Control Register does the following:
Selects one of the Master clock rates
Configure the SPI module as Master or Slave
Selects serial clock polarity and phase
Enables the SPI module
Frees the SS pin for a general-purpose
Table 75 describes this register and explains the use of each bit.
SSDIS
MODF
CPU Interrupt Request
SPI Receiver/Error
CPU Interrupt Request
SPI Transmitter
SPI
CPU Interrupt Request
SPIF
Table 75. SPCON Register
SPCON - Serial Peripheral Control Register (0C3H)
7654
3210
SPR2
SPEN
SSDIS
MSTR
CPOL
CPHA
SPR1
SPR0
Bit
Number
Bit Mnemonic
Description
7SPR2
Serial Peripheral Rate 2
Bit with SPR1 and SPR0 define the clock rate.
6
SPEN
Serial Peripheral Enable
Cleared to disable the SPI interface.
Set to enable the SPI interface.
5SSDIS
SS Disable
Cleared to enable SS in both Master and Slave modes.
Set to disable SS in both Master and Slave modes. In Slave mode, this bit has
no effect if CPHA = “0”.
5MSTR
Serial Peripheral Master
Cleared to configure the SPI as a Slave.
Set to configure the SPI as a Master.
4CPOL
Clock Polarity
Cleared to have the SCK set to “0” in idle state.
Set to have the SCK set to “1” in idle state.
3CPHA
Clock Phase
Cleared to have the data sampled when the SCK leaves the idle state (see
CPOL).
Set to have the data sampled when the SCK returns to idle state (see CPOL).
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