参数资料
型号: AT89C51IC2-RLRUL
厂商: Atmel
文件页数: 117/140页
文件大小: 0K
描述: IC 8051 MCU 32K FLASH 44-VQFP
产品培训模块: MCU Product Line Introduction
标准包装: 1,500
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
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: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LQFP
包装: 标准包装
产品目录页面: 616 (CN2011-ZH PDF)
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
其它名称: AT89C51IC2-RLRULDKR
78
AT89C51IC2
4301D–8051–02/08
Reset Value = 0001 0100b
Not bit addressable
Serial Peripheral Status Register
(SPSTA)
The Serial Peripheral Status Register contains flags to signal the following conditions:
Data transfer complete
Write collision
Inconsistent logic level on SS pin (mode fault error)
Table 59 describes the SPSTA register and explains the use of every bit in the register.
Table 59. SPSTA Register
SPSTA - Serial Peripheral Status and Control register (0C4H)
1
SPR1
SPR2
SPR1
SPR0 Serial Peripheral Rate
0
F
CLK PERIPH /2
0
1
F
CLK PERIPH /4
0
1
0
F
CLK PERIPH /8
0
1
F
CLK PERIPH /16
1
0
F
CLK PERIPH /32
1
0
1
F
CLK PERIPH /64
1
0
F
CLK PERIPH /128
1
Invalid
0
SPR0
Bit Number
Bit Mnemonic
Description
7
6
5
4
3
2
1
0
SPIF
WCOL
SSERR
MODF
-
Bit
Number
Bit
Mnemonic Description
7
SPIF
Serial Peripheral Data Transfer Flag
Cleared by hardware to indicate data transfer is in progress or has been
approved by a clearing sequence.
Set by hardware to indicate that the data transfer has been completed.
6
WCOL
Write Collision Flag
Cleared by hardware to indicate that no collision has occurred or has been
approved by a clearing sequence.
Set by hardware to indicate that a collision has been detected.
5
SSERR
Synchronous Serial Slave Error Flag
Set by hardware when SS is deasserted before the end of a received data.
Cleared by disabling the SPI (clearing SPEN bit in SPCON).
4
MODF
Mode Fault
Cleared by hardware to indicate that the SS pin is at appropriate logic level, or
has been approved by a clearing sequence.
Set by hardware to indicate that the SS pin is at inappropriate logic level.
3
-
Reserved
The value read from this bit is indeterminate. Do not set this bit
2
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
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