P80C557E4 Philips Semiconductors, P80C557E4 Datasheet - Page 68

• Manufacturer Part Number: P80C557E4
• Description: Single-chip 8-bit microcontroller
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1999 Mar 02
PORT 0
PORT 2
PORT 0
PORT 2
Single-chip 8-bit microcontroller
PSEN
PSEN
ALE
ALE
WR
RD
t
t
AVLL
AVLL
FROM RI OR DPL
FROM RI OR DPL
A0–A7
A0–A7
t
t
LLAX
t
LLAX
t
AVWL
AVWL
t
t
LLWL
LLWL
t
P2.0–P2.7 OR A8–A15 FROM DPH
P2.0–P2.7 OR A8–A15 FROM DPH
AVDV
Figure 61. External Data Memory Read Cycle
Figure 62. External Data Memory Write Cycle
t
LLDV
t
QVWX
t
t
RLDV
RLAZ
t
QVWH
DATA OUT
t
WLWH
t
RLRH
68
t
RHDX
DATA IN
P83C557E4/P80C557E4/P89C557E4
t
RHDZ
t
t
WHLH
WHLH
t
WHQX
A0–A7 FROM PCL
A0–A7 FROM PCL
A8–A15 FROM PCH
A8–A15 FROM PCH
Product specification
INSTR IN
INSTR IN