参数资料
型号: ADUC845BCPZ8-3
厂商: ANALOG DEVICES INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, QCC56
封装: 8 X 8 MM, LEAD FREE, MO-220-VLLD-2, LFCSP-56
文件页数: 106/108页
文件大小: 1940K
代理商: ADUC845BCPZ8-3
ADuC845/ADuC847/ADuC848
Rev. B | Page 97 of 108
Table 66. EXTERNAL DATA MEMORY WRITE CYCLE Parameter
12.58 MHz Core Clock
6.29 MHz Core Clock
Min
Max
Min
Max
Unit
tWLWH
WR Pulse Width
65
130
ns
tAVLL
Address Valid After ALE Low
60
120
ns
tLLAX
Address Hold After ALE Low
65
135
ns
tLLWL
ALE Low to RD or WR Low
130
260
ns
tAVWL
Address Valid to RD or WR Low
190
375
ns
tQVWX
Data Valid to WR Transition
60
120
ns
tQVWH
Data Setup Before WR
120
250
ns
tWHQX
Data and Address Hold After WR
380
755
ns
tWHLH
RD or WR High to ALE High
60
125
ns
04741-079
ALE (O)
PORT 2 (O)
tWHLH
tWLWH
tLLWL
tAVWL
tLLAX
tAVLL
tQVWX
tQVWH
tWHQX
A0 A7
DATA
A16 A23
V8 A15
PSEN (O)
WR (O)
Figure 74. External Data Memory Write Cycle
Table 67. I2C-COMPATIBLE INTERFACE TIMING Parameter
Parameter
Min
Max
Unit
tL
SCLCK Low Pulse Width
1.3
s
tH
SCLCK High Pulse Width
0.6
s
tSHD
Start Condition Hold Time
0.6
s
tDSU
Data Setup Time
100
s
tDHD
Data Hold Time
0.9
s
tRSU
Setup Time for Repeated Start
0.6
s
tPSU
Stop Condition Setup Time
0.6
s
tBUF
Bus Free Time Between a Stop Condition and a Start Condition
1.3
s
tR
Rise Time of Both SCLCK and SDATA
300
ns
tF
Fall Time of Both SCLCK and SDATA
300
ns
tSUP1
Pulse Width of Spike Suppressed
50
ns
____________________________________________
1 Input filtering on both the SCLOCK and SDATA inputs suppresses noise spikes less than 50 ns.
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