at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 167

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

21.8.2.2
6384B–ATARM–15-Dec-08
Read is Controlled by NCS (READ_MODE = 0)
Figure 21-10. READ_MODE = 1: Data is sampled by SMC before the rising edge of NRD
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.
Figure 21-11. READ_MODE = 0: Data is sampled by SMC before the rising edge of NCS
NBS0,NBS1,
NBS2,NBS3,
A0, A1
NBS0,NBS1,
NBS2,NBS3,
A0, A1
D[31:0]
A[25:2]
D[31:0]
A[25:2]
MCK
MCK
NRD
NCS
NRD
NCS
shows the typical read cycle of an LCD module. The read data is valid t
AT91SAM9G20 Preliminary
t
t
PACC
PACC
Data Sampling
Data Sampling
PACC
after
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