ADUC812 Datasheet, PDF (24/31 Pages) Analog Devices – MicroConverter™, Multichannel 12-Bit ADC with Embedded FLASH MCU

ADuC812
Parameter
EXTERNAL DATA MEMORY WRITE CYCLE
t_WLWH
t_AVLL
t_LLAX
t_LLWL
t_AVWL
t_QVWX
t_QVWH
t_WHQX
t_WHLH
WR Pulsewidth
Address Valid After ALE Low
Address Hold After ALE Low
ALE Low to RD or WR Low
Address Valid to RD or WR Low
Data Valid to WR Transition
Data Setup Before WR
Data and Address Hold After WR
RD or WR High to ALE High
12 MHz
Min
Max
400
43
48
200
300
203
33
433
33
43
123
Variable Clock
Min
Max
Units Figure
6t_CK – 100
ns
24
t_CK – 40
ns
24
t_CK – 35
ns
24
3t_CK – 50 3t_CK + 50 ns
24
4t_CK – 130
ns
24
t_CK – 50
ns
24
7t_CK – 150
ns
24
t_CK – 50
ns
24
t_CK – 40
6t_CK – 100 ns
24
MCLK
ALE (O)
PSEN (O)
t_LLWL
WR (O)
PORT 0 (O)
t_AVLL
t_AVWL
t_LLAX
A0–A7
t_WLWH
t_QVWX
t_QVWH
DATA
t_WHLH
t_WHQX
PORT 2 (O)
A16–A23
A8–A15
Figure 24. External Data Memory Write Cycle
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