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AT83SND2CMP3B Datasheet(PDF) 132 Page - ATMEL Corporation

Part # AT83SND2CMP3B
Description  Single-Chip Flash Microcontroller with MP3 Decoder with Full Audio Interface
PDF  241 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT83SND2CMP3B Datasheet(HTML) 132 Page - ATMEL Corporation

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132
4341F–MP3–03/06
AT8xC51SND2C/MP3B
Figure 17-2.
IDE Write Waveforms
Notes:
1. WR signal may be stretched using M0 bit in AUXR register.
2. When executing MOVX @Ri instruction, P2 outputs SFR content.
3. When executing MOVX @DPTR instruction, if DPHDIS is set (Page Access Mode), P2 out-
puts SFR content instead of DPH.
17.1.1
IDE Device Connection
Figure 17-3 and Figure 17-4 show 2 examples on how to interface up to 2 IDE devices to the
AT8xC51SND2C. In both examples P0 carries IDE low order data bits D7:0, P2 carries IDE high
order data bits D15:8, while RD and WR signals are respectively connected to the IDE nIOR and
nIOW signals. Other IDE control signals are generated by the external address latch outputs in
the first example while they are generated by some port I/Os in the second one. Using an exter-
nal latch will achieve higher transfer rate.
Figure 17-3.
IDE Device Connection Example 1
Figure 17-4.
IDE Device Connection Example 2
ALE
P0
P2
WR(1)
DPL or Ri
D7:0
P2
CPU Clock
DPH or P2(2),(3)
D15:8
P2
P2
P0
D15-8
A2:0
ALE
nIOW
nIOR
RD
WR
D7:0
nCS1:0
nRESET
D15-8
A2:0
nIOW
nIOR
D7:0
nCS1:0
nRESET
Latch
IDE Device 0
IDE Device 1
AT8xC51SND2C
Px.y
P2/A15:8
P0/AD7:0
D15-8
A2:0
P4.5
nIOW
nIOR
RD
WR
D7:0
nCS1:0
nRESET
D15-8
A2:0
nIOW
nIOR
D7:0
nCS1:0
nRESET
P4.2:0
P4.4:3
IDE Device 0
AT8xC51SND2C
IDE Device 1



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