参数资料
型号: AT89C51ID2-SLSUM
厂商: Atmel
文件页数: 153/157页
文件大小: 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 972
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
95
AT89C51ID2
4289C–8051–11/05
Registers
Table 71. SSCON Register
SSCON - Synchronous Serial Control register (93h)
76
543
210
CR2
SSIE
STA
STO
SI
AA
CR1
CR0
Bit
Number
Bit
Mnemonic
Description
7CR2
Control Rate bit 2
6SSIE
Synchronous Serial Interface Enable bit
Clear to disable the TWI module.
Set to enable the TWI module.
5STA
Start flag
Set to send a START condition on the bus.
4ST0
Stop flag
Set to send a STOP condition on the bus.
3SI
Synchronous Serial Interrupt flag
Set by hardware when a serial interrupt is requested.
Must be cleared by software to acknowledge interrupt.
2AA
Assert Acknowledge flag
Clear in master and slave receiver modes, to force a not acknowledge (high level
on SDA).
Clear to disable SLA or GCA recognition.
Set to recognise SLA or GCA (if GC set) for entering slave receiver or transmitter
modes.
Set in master and slave receiver modes, to force an acknowledge (low level on
SDA).
This bit has no effect when in master transmitter mode.
1CR1
Control Rate bit 1
0CR0
Control Rate bit 0
Table 72. SSDAT (095h) - Syncrhonous Serial Data register (read/write)
SD7SD6
SD5SD4
SD3SD2
SD1
SD0
76
543
210
Bit
Number
Bit
Mnemonic
Description
7
SD7
Address bit 7 or Data bit 7.
6
SD6
Address bit 6 or Data bit 6.
5
SD5
Address bit 5 or Data bit 5.
4
SD4
Address bit 4 or Data bit 4.
3
SD3
Address bit 3 or Data bit 3.
2
SD2
Address bit 2 or Data bit 2.
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