at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 234

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

21.14.3
Register Name:
Access Type:
• NWE_CYCLE: Total Write Cycle Length
The total write cycle length is the total duration in clock cycles of the write cycle. It is equal to the sum of the setup, pulse
and hold steps of the NWE and NCS signals. It is defined as:
Write cycle length = (NWE_CYCLE[8:7]*256 + NWE_CYCLE[6:0]) clock cycles
• NRD_CYCLE: Total Read Cycle Length
The total read cycle length is the total duration in clock cycles of the read cycle. It is equal to the sum of the setup, pulse
and hold steps of the NRD and NCS signals. It is defined as:
Read cycle length = (NRD_CYCLE[8:7]*256 + NRD_CYCLE[6:0]) clock cycles
234
31
23
15
–
–
7
AT91SAM9263 Preliminary
SMC Cycle Register
30
22
14
SMC_CYCLE[0..7]
Read/Write
–
–
6
29
21
13
–
–
5
28
20
12
–
–
4
NWE_CYCLE
NRD_CYCLE
27
19
11
–
–
3
26
18
10
–
–
2
25
17
–
9
–
1
6249D–ATARM–20-Dec-07
NWE_CYCLE
NRD_CYCLE
24
16
8
0