參數資料
型號: 89C51RB2
廠商: NXP Semiconductors N.V.
英文描述: 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
中文描述: 80C51的8位閃存微控制器系列16KB/32KB/64KB的ISP /聯(lián)合會與512B/512B/1KB內存閃存
文件頁數: 35/52頁
文件大?。?/td> 289K
代理商: 89C51RB2
Philips Semiconductors
Preliminary specification
89C51RB2/89C51RC2/
89C51RD2
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
1999 Sep 23
35
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The first character is always
‘t’ (= time). The other characters, depending on their positions,
indicate the name of a signal or the logical status of that signal. The
designations are:
A – Address
C – Clock
D – Input data
H – Logic level high
I – Instruction (program memory contents)
L – Logic level low, or ALE
P – PSEN
Q – Output data
R – RD signal
t – Time
V – Valid
W– WR signal
X – No longer a valid logic level
Z – Float
Examples:
t
AVLL
t
LLPL
= Time for address valid to ALE low.
= Time for ALE low to PSEN low.
t
PXIZ
ALE
PSEN
PORT 0
PORT 2
A0–A15
A8–A15
A0–A7
A0–A7
t
AVLL
t
PXIX
t
LLAX
INSTR IN
t
LHLL
t
PLPH
t
LLIV
t
PLAZ
t
LLPL
t
AVIV
SU00006
t
PLIV
Figure 29. External Program Memory Read Cycle
ALE
PSEN
PORT 0
PORT 2
RD
A0–A7
FROM RI OR DPL
DATA IN
A0–A7 FROM PCL
INSTR IN
P2.0–P2.7 OR A8–A15 FROM DPF
A0–A15 FROM PCH
t
WHLH
t
LLDV
t
LLWL
t
RLRH
t
LLAX
t
RLAZ
t
AVLL
t
RHDX
t
RHDZ
t
AVWL
t
AVDV
t
RLDV
SU00025
Figure 30. External Data Memory Read Cycle
相關PDF資料
PDF描述
89C51RC2 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
89C51RD2 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
89C51ED2 8-bit Flash Microcontroller
89C536 80C51 8-bit microcontroller family 16K/64K/512 FLASH
89C538 CMOS single-chip 8-bit microcontrollers with FLASH program memory
相關代理商/技術參數
參數描述
89C51RB2-CM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with 16K/32K Bytes Flash
89C51RB2-IL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with 16K/32K Bytes Flash
89C51RB2-IM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/ 32K Bytes Flash
89C51RB2-UL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/ 32K Bytes Flash
89C51RB2-UM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/ 32K Bytes Flash