P83C652EBPN 查看數據表（PDF） - Philips Electronics

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P83C652EBPN

CMOS single-chip 8-bit microcontrollers

Philips Electronics 

Phlips Semiconductors

CMOS single-chip 8-bit microcontrollers

Product specification

80C652/83C652

EXPLANATION OF THE AC SYMBOLS

Each timing symbol has five characters. The Q – Output data

first character is always ‘t’ (= time). The other R – RD signal

characters, depending on their positions,

t – Time

indicate the name of a signal or the logical

V – Valid

status of that signal. The designations are:

W – WR signal

A – Address

X – No longer a valid logic level

C – Clock

Z – Float

D – Input data

H – Logic level high

Examples: tAVLL = Time for address valid

to ALE low.

I – Instruction (program memory contents)

L – Logic level low, or ALE

tLLPL = Time for ALE low

to PSEN low.

P – PSEN

ALE

PSEN

PORT 0

PORT 2

tLHLL

tAVLL

tLLPL

tPLPH

tLLIV

tPLIV

tLLAX

tPLAZ

tPXIX

tPXIZ

A0–A7

INSTR IN

tAVIV

A8–A15

A0–A7

A8–A15

Figure 2. External Program Memory Read Cycle

ALE

PSEN

RD

PORT 0

PORT 2

tWHLH

tLLDV

tLLWL

tRLRH

tAVLL

tLLAX

A0–A7

FROM RI OR DPL

tRLAZ

tRLDV

tRHDX

DATA IN

tAVWL

tAVDV

P2.0–P2.7 OR A8–A15 FROM DPH

tRHDZ

A0–A7 FROM PCL

A8–A15 FROM PCH

Figure 3. External Data Memory Read Cycle

1997 Dec 05

15

INSTR IN

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