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AT83SND1CXXX-ROTIL 데이터시트(PDF) 131 Page - ATMEL Corporation

부품명 AT83SND1CXXX-ROTIL
상세설명  Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
PDF  212 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT83SND1CXXX-ROTIL 데이터시트(HTML) 131 Page - ATMEL Corporation

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4109J–8051–10/06
AT8xC51SND1C
Figure 16-2. 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.
16.1.1
IDE Device Connection
Figure 16-3 and Figure 16-4 show 2 examples on how to interface up to 2 IDE devices to the
AT8xC51SND1C. 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 16-3. IDE Device Connection Example 1
Figure 16-4. 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
AT8xC51SND1C
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
AT8xC51SND1C
IDE Device 1



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