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參數(shù)資料
| 型號(hào)： | MR80C154U-36:D |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER |
| 文件頁數(shù)： | 321/416頁 |
| 文件大?。?/td> | 10516K |
422
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
29.16.2 SMC Pulse Register
Name:
SMC_PULSE[0..5]
Address:
0xFFFFEA04 [0], 0xFFFFEA14 [1], 0xFFFFEA24 [2], 0xFFFFEA34 [3], 0xFFFFEA44 [4], 0xFFFFEA54 [5]
Access:
Read-write
NWE_PULSE: NWE Pulse Length
The NWE signal pulse length is defined as:
NWE pulse length = (256* NWE_PULSE[6] + NWE_PULSE[5:0]) clock cycles
The NWE pulse length must be at least 1 clock cycle.
NCS_WR_PULSE: NCS Pulse Length in WRITE Access
In write access, the NCS signal pulse length is defined as:
NCS pulse length = (256* NCS_WR_PULSE[6] + NCS_WR_PULSE[5:0]) clock cycles
The NCS pulse length must be at least 1 clock cycle.
NRD_PULSE: NRD Pulse Length
In standard read access, the NRD signal pulse length is defined in clock cycles as:
NRD pulse length = (256* NRD_PULSE[6] + NRD_PULSE[5:0]) clock cycles
The NRD pulse length must be at least 1 clock cycle.
In page mode read access, the NRD_PULSE parameter defines the duration of the subsequent accesses in the page.
NCS_RD_PULSE: NCS Pulse Length in READ Access
In standard read access, the NCS signal pulse length is defined as:
NCS pulse length = (256* NCS_RD_PULSE[6] + NCS_RD_PULSE[5:0]) clock cycles
The NCS pulse length must be at least 1 clock cycle.
In page mode read access, the NCS_RD_PULSE parameter defines the duration of the first access to one page.
31
30
29
28
27
26
25
24
–
NCS_RD_PULSE
23
22
21
20
19
18
17
16
–
NRD_PULSE
15
14
13
12
11
10
9
8
–
NCS_WR_PULSE
76
543210
–NWE_PULSE
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