Figure 22-29, Ure 22-29 – Rainbow Electronics AT91CAP9S250A User Manual

Page 197

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197

6264A–CAP–21-May-07

AT91CAP9S500A/AT91CAP9S250A

Figure 22-29. NWAIT Assertion in Read Access: Ready Mode (EXNW_MODE = 11)

EXNW_MODE = 11(Ready mode)
READ_MODE = 0 (NCS_controlled)

NRD_PULSE = 7
NCS_RD_PULSE =7

A[25:2]

MCK

NCS

NRD

4

5

6

3

2

0

0

0

1

4

5

6

3

2

1

1

Read cycle

Assertion is ignored

NWAIT

internally synchronized

NWAIT signal

Wait STATE

Assertion is ignored

NBS0, NBS1,
NBS2, NBS3,
A0,A1

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