参数资料
型号: AT89S51-24JU
厂商: Atmel
文件页数: 14/31页
文件大小: 0K
描述: IC MCU 4K FLASH 24MHZ 44-PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 27
系列: 89S
核心处理器: 8051
芯体尺寸: 8-位
速度: 24MHz
连通性: UART/USART
外围设备: WDT
输入/输出数: 32
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
产品目录页面: 616 (CN2011-ZH PDF)
21
2487D–MICRO–6/08
AT89S51
21. Serial Programming Characteristics
Figure 21-1. Serial Programming Timing
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
t
SLIV
Table 21-1.
Serial Programming Characteristics, T
A = -40 C to 85 C, VCC = 4.0 - 5.5V (Unless Otherwise Noted)
Symbol
Parameter
Min
Typ
Max
Units
1/tCLCL
Oscillator Frequency
3
33
MHz
tCLCL
Oscillator Period
30
ns
tSHSL
SCK Pulse Width High
8 tCLCL
ns
tSLSH
SCK Pulse Width Low
8 tCLCL
ns
tOVSH
MOSI Setup to SCK High
tCLCL
ns
tSHOX
MOSI Hold after SCK High
2 tCLCL
ns
tSLIV
SCK Low to MISO Valid
10
16
32
ns
tERASE
Chip Erase Instruction Cycle Time
500
ms
tSWC
Serial Byte Write Cycle Time
64 tCLCL + 400
s
22. Absolute Maximum Ratings*
Operating Temperature.................................. -55°C to +125°C
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability.
Storage Temperature ..................................... -65°C to +150°C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage ............................................ 6.6V
DC Output Current...................................................... 15.0 mA
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