參數(shù)資料
型號: IS89C51-12PL
廠商: INTEGRATED SILICON SOLUTION INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 42/48頁
文件大?。?/td> 371K
代理商: IS89C51-12PL
IS89C51
Integrated Silicon Solution, Inc. — 1-800-379-4774
47
MC016-1C
11/21/98
ISSI
tAVLL
A7-A0 FROM RI OR DPL
INSTR IN
A7-A0 FROM PCL
tAVWL
PSEN
PORT 0
PORT 2
ALE
WR
DATA OUT
A15-A8 FROM DPH
A15-A8 FROM PCH
tWHLH
tLLWL
tLLAX
tQVWX
tWHQX
tWLWH
INSTRUCTION
ALE
CLOCK
DATAOUT
DATAIN
tXLXL
tXHQX
tQVXH
tXHDV
tXHDX
VALID
SET TI
SET RI
78
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Figure 34. External Data Memory Write Cycle
Figure 35. Shift Register Mode Timing Waveform
0.45V
Vcc – 0.5V
tCHCX
tCLCL
tCLCH
tCLCX
tCHCL
0.7Vcc
0.2Vcc – 0.1
Figure 36. External Clock Drive Waveform
Note:
1. AC inputs during testing are driven at VCC – 0.5V for logic “1” and 0.45V for logic “0”.
Timing measurements are made at VIH min for logic “1” and max for logic “0”.
Vcc - 0.5V
0.45V
0.2Vcc + 0.9V
0.2Vcc - 0.1V
Figure 37. AC Test Point
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