Datasheet

224
4341H–MP3–10/07
AT8xC51SND2C/MP3B
24.3.3.3 Waveforms
Figure 24-17. External IDE 16-bit Bus Cycle - Data Read Waveforms
Note: 1. D15:8 is written in DAT16H SFR.
Figure 24-18. External IDE 16-bit Bus Cycle - Data Write Waveforms
Note: 1. D15:8 is the content of DAT16H SFR.
24.4 SPI Interface
24.4.0.4 Definition of Symbols
Table 24-17. SPI Interface Timing Symbol Definitions
T
AVDV
T
LLAX
T
RHDX
T
RHDZ
T
AVLL
T
AVRL
P2
P0
RD
ALE
T
LHLL
T
RLRH
Data In
T
RLAZ
T
LLRL
T
RHLH
T
RLDV
D7:0A7:0
Data In
D15:8
(1)
A15:8
T
WHLH
T
AVWL
T
LLAX
T
WHQX
P2
P0
WR
ALE
T
LHLL
T
WLWH
T
AVLL
T
QVWH
D7:0
Data Out
T
LLWL
A7:0
D15:8
(1)
Data Out
A15:8
Signals Conditions
C Clock H High
I Data In L Low
O Data Out V Valid
X No Longer Valid
Z Floating