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87C652 Datasheet(PDF) 14 Page - NXP Semiconductors

Part # 87C652
Description  80C51 8-bit microcontroller 8K/16K, 256 OTP, I2C
PDF  24 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

87C652 Datasheet(HTML) 14 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
87C652/87C654
80C51 8-bit microcontroller
8K/16K, 256 OTP, I2C
1999 Jul 23
14
tLLAX
ALE
PSEN
PORT 0
PORT 2
WR
A0–A7
FROM RI OR DPL
DATA OUT
A0–A7 FROM PCL
INSTR IN
P2.0–P2.7 OR A8–A15 FROM DPH
A8–A15 FROM PCH
tWHLH
tLLWL
tWLWH
tAVLL
tAVWL
tQVWX
tWHQX
tDW
SU00213
Figure 3. External Data Memory Write Cycle
0
1
2
3
4
5
678
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
VALID
VALID
VALID
VALID
VALID
VALID
VALID
VALID
SET TI
SET RI
tXLXL
tQVXH
tXHQX
tXHDX
tXHDV
SU00027
12
3
0
456
7
Figure 4. Shift Register Mode Timing
VCC–0.5
0.45V
0.7VCC
0.2VCC–0.1
tCHCL
tCLCL
tCLCH
tCLCX
tCHCX
SU00009
Figure 5. External Clock Drive



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