3 waveforms, 3 spi interface, 1 definition of symbols – Atmel AT89C5132 User Manual
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4173ES–USB–09/07
AT89C5132
6.3.2.3
Waveforms
Figure 6-10. External IDE 16-bit Bus Cycle – Data Read Waveforms
Note:
D15:8 is written in DAT16H SFR.
Figure 6-11.
External IDE 16-bit Bus Cycle – Data Write Waveforms
Note:
D15:8 is the content of DAT16H SFR.
6.3.3
SPI Interface
6.3.3.1
Definition of Symbols
Table 12. 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No Longer Valid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