AT91M40400 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT91M40400' PDF : 116 Pages View PDF
AT91M40400
EBI Remap Control Register
Register Name: EBI_RCR
Access Type:
Write only
Absolute Address: 0xFFE00020
31
30
29
28
27
26
25
24
---
---
---
---
---
---
---
---
23
22
21
20
19
18
17
16
---
---
---
---
---
---
---
---
15
14
13
12
11
10
9
8
---
---
---
---
---
---
---
---
7
6
5
4
3
2
1
0
---
---
---
---
---
---
---
RCB
• RCB: Remap Command Bit
0 = No effect.
1 = Cancels the remapping (performed at reset) of the page zero memory devices.
EBI Memory Control Register
Register Name: EBI_MCR
Access Type:
Read/Write
Reset Value:
See Table 4
Absolute Address: 0xFFE00024
31
30
29
28
27
---
---
---
---
---
23
22
21
20
19
---
---
---
---
---
15
14
13
12
11
---
---
---
---
---
7
6
5
4
3
---
---
---
DRP
---
26
25
---
---
18
17
---
---
10
9
---
---
2
1
ALE
• ALE: Address Line Enable
This field determines the number of valid address lines and the number of valid chip select lines.
ALE
Valid Address Bits
0
X
X A20, A21, A22, A23
1
0
0 A20, A21, A22
1
0
1 A20, A21
1
1
0 A20
1
1
1 none
Maximum Addressable Space
16M bytes
8M bytes
4M bytes
2M bytes
1M bytes
Valid Chip Select
none
CS4
CS4, CS5
CS4, CS5, CS6
CS4, CS5, CS6, CS7
• DRP: Data Read Protocol
0 = Standard read protocol for all external memory devices enabled.
1 = Early read protocol for all external memory devices enabled.
24
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16
---
8
---
0
33
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