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89C52 Datasheet(PDF) 31 Page - NXP Semiconductors

Part # 89C52
Description  80C51 8-bit microcontroller family 4K/8K/16K/32K Flash
PDF  39 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

89C52 Datasheet(HTML) 31 Page - NXP Semiconductors

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Philips Semiconductors
Product data
89C51/89C52/89C54/89C58
80C51 8-bit microcontroller family
4K/8K/16K/32K Flash
2002 Jan 15
31
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 DPF
A0–A15 FROM PCH
tWHLH
tLLWL
tWLWH
tAVLL
tAVWL
tQVWX
tWHQX
tQVWH
SU00026
Figure 20. External Data Memory Write Cycle
VALID
0
1
2
3
4
5
678
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
SET TI
SET RI
tXLXL
tQVXH
tXHQX
tXHDX
tXHDV
SU00027
12
3
0
456
7
VALID
VALID
VALID
VALID
VALID
VALID
VALID
Figure 21. Shift Register Mode Timing
VCC–0.5
0.45V
0.7VCC
0.2VCC–0.1
tCHCL
tCLCL
tCLCH
tCLCX
tCHCX
SU00009
Figure 22. External Clock Drive



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