P87C51FB-4B,557 NXP Semiconductors, P87C51FB-4B,557 Datasheet - Page 41
P87C51FB-4B,557
Manufacturer Part Number
P87C51FB-4B,557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.P87C51FB-4B.pdf
(56 pages)
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Part Number:
P87C51FB-4B,557
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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Philips Semiconductors
2000 Aug 07
WRITE TO SBUF
INSTRUCTION
PORT 0
PORT 2
INPUT DATA
OUTPUT DATA
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33MHz)
CLEAR RI
PSEN
ALE
WR
CLOCK
ALE
t
AVLL
0
t
QVXH
FROM RI OR DPL
A0–A7
t
t
1
XHDV
LLAX
t
AVWL
0
t
t
XLXL
VALID
LLWL
V
CC
0.45V
–0.5
P2.0–P2.7 OR A8–A15 FROM DPF
Figure 31. External Data Memory Write Cycle
t
XHQX
2
Figure 32. Shift Register Mode Timing
1
VALID
t
QVWX
Figure 33. External Clock Drive
0.2V
t
CHCL
0.7V
t
CC
t
XHDX
DATA OUT
QVWH
CC
3
t
WLWH
–0.1
2
VALID
41
t
CLCX
4
t
CLCL
VALID
3
t
CHCX
t
CLCH
t
WHLH
t
5
WHQX
8XC51RA+/RB+/RC+/RD+/80C51RA+
SU00009
VALID
4
A0–A7 FROM PCL
A0–A15 FROM PCH
6
8XC51FA/FB/FC/80C51FA
VALID
5
7
VALID
6
Product specification
8XC54/58
INSTR IN
8
SU00026
SET TI
VALID
SET RI
SU00027
7
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