at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 209
at91sam9263
Manufacturer Part Number
at91sam9263
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9263.pdf
(1065 pages)
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Figure 21-15. WRITE_MODE = 0. The write operation is controlled by NCS
21.8.5
Table 21-4.
6249D–ATARM–20-Dec-07
Coded Value
setup [5:0]
pulse [6:0]
cycle [8:0]
Coding Timing Parameters
Coding and Range of Timing Parameters
NWR0, NWR1,
NWR2, NWR3
NBS0, NBS1,
NBS2, NBS3,
A0, A1
Number of Bits
D[31:0]
A
NWE,
[25:2]
MCK
All timing parameters are defined for one chip select and are grouped together in one
SMC_REGISTER according to their type.
The SMC_SETUP register groups the definition of all setup parameters:
• nrd_setup, ncs_rd_setup, nwe_setup, ncs_wr_setup
The SMC_PULSE register groups the definition of all pulse parameters:
• NRD_PULSE, NCS_RD_PULSE, NWE_PULSE, NCS_WR_PULSE
The SMC_CYCLE register groups the definition of all cycle parameters:
• NRD_CYCLE, NWE_CYCLE
Table 21-4
NCS
6
7
9
shows how the timing parameters are coded and their permitted range.
256 x cycle[8:7] + cycle[6:0]
128 x setup[5] + setup[4:0]
256 x pulse[6] + pulse[5:0]
Effective Value
AT91SAM9263 Preliminary
Coded Value
0 ≤ ≤ 127
0 ≤ ≤ 31
0 ≤ ≤ 63
Permitted Range
256 ≤ ≤ 256+127
512 ≤ ≤ 512+127
768 ≤ ≤ 768+127
Effective Value
128 ≤ ≤ 128+31
256 ≤ ≤ 256+63
209
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