參數(shù)資料
型號: T89C51AC2-SLSIM
廠商: Atmel
文件頁數(shù): 10/121頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
標準包裝: 27
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
107
A/T89C51AC2
4127H–8051–02/08
External Data Memory
Characteristics
Table 81. Symbol Description
Table 82. AC Parameters for a Variable Clock (F = 40 MHz)
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
Symbol
Min
Max
Units
T
RLRH
130
ns
T
WLWH
130
ns
T
RLDV
100
ns
T
RHDX
0
ns
T
RHDZ
30
ns
T
LLDV
160
ns
T
AVDV
165
ns
T
LLWL
50
100
ns
T
AVWL
75
ns
T
QVWX
10
ns
T
QVWH
160
ns
T
WHQX
15
ns
T
RLAZ
0
ns
T
WHLH
10
40
ns
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