Rainbow Electronics AT89C5132 - Manual (Page 145)

145
AT8xC5132
4173A–8051–08/02
Waveforms Figure 121. External IDE 16-bit Bus Cycle – Data Read Waveforms
Note: D15:8 is written in DAT16H SFR.
Figure 122. External IDE 16-bit Bus Cycle – Data Write Waveforms
Note: D15:8 is the content of DAT16H SFR.
SPI Interface
Definition of Symbols Table 135. 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
D7:0 A7:0
Data In
D15:81 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
D15:81
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X No Longer Valid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