AT91M40400-25C ATMEL Corporation, AT91M40400-25C Datasheet - Page 33

• Manufacturer Part Number: AT91M40400-25C
• Description: 16/32-bit Microcontroller, 2.7V to 3.6V Operating Range
• Manufacturer: ATMEL Corporation

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