at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 126
at91cap7e
Manufacturer Part Number
at91cap7e
Description
Customizable Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT91CAP7E.pdf
(520 pages)
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Table 20-9.
20.6.5.5
126
Pins
NRD/CFOE
NWR0/NWE/CFWE
NWR1/NBS1/CFIOR
NWR3/NBS3/CFIOW
A25/CFRNW
AT91CAP7E
Application Example
Shared CompactFlash Interface Multiplexing
Figure 20-5 on page 127
CFRNW signals are not directly connected to the CompactFlash slot 0, but do control the direc-
tion and the output enable of the buffers between the EBI and the CompactFlash Device. The
timing of the CFCS0 signal is identical to the NCS4 signal. Moreover, the CFRNW signal
remains valid throughout the transfer, as does the address bus. The CompactFlash _WAIT sig-
nal is connected to the NWAIT input of the Static Memory Controller. For details on these
waveforms and timings, refer to the Static Memory Controller section.
Access to CompactFlash Device
CompactFlash Signals
CFRNW
illustrates an example of a CompactFlash application. CFCS0 and
CFIOW
CFIOR
CFWE
CFOE
Access to Other EBI Devices
NWR1/NBS1
NWR3/NBS3
EBI Signals
NWR0/NWE
NRD
A25
8549A–CAP–10/08
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