參數資料
型號: AT89C51ID2-SLSUM
廠商: Atmel
文件頁數: 3/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
產品培訓模塊: MCU Product Line Introduction
標準包裝: 972
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設備: POR,PWM,WDT
輸入/輸出數: 34
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
100
AT89C51ID2
4289C–8051–11/05
Functional Description
Figure 37 shows a detailed structure of the SPI Module.
Figure 37. SPI Module Block Diagram
Operating Modes
The Serial Peripheral Interface can be configured in one of the two modes: Master
mode or Slave mode. The configuration and initialization of the SPI Module is made
through one register:
The Serial Peripheral Control register (SPCON)
Once the SPI is configured, the data exchange is made using:
SPCON
The Serial Peripheral STAtus register (SPSTA)
The Serial Peripheral DATa register (SPDAT)
During an SPI transmission, data is simultaneously transmitted (shifted out serially) and
received (shifted in serially). A serial clock line (SCK) synchronizes shifting and sam-
pling on the two serial data lines (MOSI and MISO). A Slave Select line (SS) allows
individual selection of a Slave SPI device; Slave devices that are not selected do not
interfere with SPI bus activities.
When the Master device transmits data to the Slave device via the MOSI line, the Slave
device responds by sending data to the Master device via the MISO line. This implies
full-duplex transmission with both data out and data in synchronized with the same clock
Shift Register
0
1
2
3
4
5
6
7
Internal Bus
Pin
Control
Logic
MISO
MOSI
SCK
M
S
Clock
Logic
Clock
Divider
Clock
Select
/4
/64
/128
SPI Interrupt Request
8-bit bus
1-bit signal
SS
FCLK PERIPH
/32
/8
/16
Receive Data Register
SPDAT
SPI
Control
SPSTA
CPHA
SPR0
SPR1
CPOL
MSTR
SSDIS
SPEN
SPR2
SPCON
WCOL
MODF
SPIF
-
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