AT89C51SND2C Datasheet, PDF (220/236 Pages) ATMEL Corporation – Single-Chip Flash Microcontroller with MP3 Decoder with Full Audio Interface

Waveforms
SPI Interface
Definition of Symbols
Figure 155. External IDE 16-bit Bus Cycle - Data Read Waveforms
ALE
T_LHLL
T_LLRL
T_RLRH
T_RHLH
RD
T_AVLL
T_RLAZ
T_LLAX
T_RLDV
T_RHDZ
T_RHDX
P0
A7:0
D7:0
T_AVRL
T_AVDV
Data In
P2
A15:8
D15:8⁽¹⁾
Data In
Note: 1. D15:8 is written in DAT16H SFR.
Figure 156. External IDE 16-bit Bus Cycle - Data Write Waveforms
ALE
T_LHLL
T_LLWL
T_WLWH
T_WHLH
WR
T_AVLL
T_AVWL
T_LLAX
T_QVWH
T_WHQX
P0
A7:0
D7:0
Data Out
P2
A15:8
D15:8⁽¹⁾
Data Out
Note: 1. D15:8 is the content of DAT16H SFR.
Table 196. SPI Interface Timing Symbol Definitions
Signals
C
Clock
H
I
Data In
L
O
Data Out
V
X
Z
Conditions
High
Low
Valid
No Longer Valid
Floating
220 AT8xC51SND2C
4341E–MP3–06/05