at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 205

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 21-10. READ_MODE = 1: Data is sampled by SMC before the rising edge of NRD
21.8.2.2
Figure 21-11. READ_MODE = 0: Data is sampled by SMC before the rising edge of NCS
6249D–ATARM–20-Dec-07
Read is Controlled by NCS (READ_MODE = 0)
NBS0,NBS1,
NBS2,NBS3,
A0, A1
NBS0,NBS1,
NBS2,NBS3,
A0, A1
D[31:0]
D[31:0]
A[25:2]
A[25:2]
MCK
MCK
NRD
NCS
NRD
NCS
Figure 21-11
the falling edge of the NCS signal and remains valid until the rising edge of NCS. Data must be
sampled when NCS is raised. In that case, the READ_MODE must be set to 0 (read is controlled
by NCS): the SMC internally samples the data on the rising edge of Master Clock that generates
the rising edge of NCS, whatever the programmed waveform of NRD may be.
shows the typical read cycle of an LCD module. The read data is valid t
t
t
PACC
PACC
Data Sampling
Data Sampling
AT91SAM9263 Preliminary
PACC
after
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