AT89C51SND1C-ROTIL ATMEL Corporation, AT89C51SND1C-ROTIL Datasheet - Page 31

• Manufacturer Part Number: AT89C51SND1C-ROTIL
• Description: Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface
• Manufacturer: ATMEL Corporation

External IDE 16-bit Bus Cycles
Definition of Symbols
Timings
4106F–8051–10/02
Figure 16. External 8-bit Bus Cycle – Data Write Waveforms
Table 42. External IDE 16-bit Bus Cycles Timing Symbol Definitions
Test conditions: capacitive load on all pins = 50 pF.
Q
W
A
D
R
ALE
L
WR
P0
P2
Signals
Address
Data In
ALE
Data Out
RD
WR
T
LHLL
T
AVLL
A7:0
T
T
LLAX
AVWL
T
LLWL
A15:8
T
QVWH
Data Out
T
WLWH
AT8xC51SND1C
D7:0
H
V
X
Z
L
Conditions
T
WHQX
T
WHLH
High
Low
Valid
No Longer Valid
Floating
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