參數(shù)資料
型號(hào): T89C51RD2-DDVCM
廠商: ATMEL CORP
元件分類(lèi): 微控制器/微處理器
英文描述: 0 to 40 MHz Flash Programmable 8-bit Microcontroller
中文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, UUC
封裝: DIE
文件頁(yè)數(shù): 88/104頁(yè)
文件大小: 798K
代理商: T89C51RD2-DDVCM
88
T89C51RD2
4243G
8051
05/03
External Data Memory
Characteristics
Table 48.
Symbol Description
Symbol
Parameter
T
RLRH
RD Pulse Width
T
WLWH
WR Pulse Width
T
RLDV
RD to Valid Data In
T
RHDX
Data Hold After RD
T
RHDZ
Data Float After RD
T
LLDV
ALE to Valid Data In
T
AVDV
Address to Valid Data In
T
LLWL
ALE to WR or RD
T
AVWL
Address to WR or RD
T
QVWX
Data Valid to WR Transition
T
QVWH
Data set-up to WR High
T
WHQX
Data Hold After WR
T
RLAZ
RD Low to Address Float
T
WHLH
RD or WR High to ALE high
Table 49.
AC Parameters for a Fix Clock
Symbol
-M
-L
Units
Min
Max
Min
Max
T
RLRH
130
130
ns
T
WLWH
130
130
ns
T
RLDV
100
100
ns
T
RHDX
0
0
ns
T
RHDZ
30
30
ns
T
LLDV
160
160
ns
T
AVDV
165
165
ns
T
LLWL
50
100
50
100
ns
T
AVWL
75
75
ns
T
QVWX
10
10
ns
T
QVWH
160
160
ns
T
WHQX
15
15
ns
T
RLAZ
0
0
ns
T
WHLH
10
40
10
40
ns
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