AT91R40807-33AI Atmel, AT91R40807-33AI Datasheet - Page 49

• Manufacturer Part Number: AT91R40807-33AI
• Description: IC ARM7 MCU 176 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91R40807-33AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

EBI Memory Control Register
Register Name: EBI_MCR
Access Type:
Reset Value:
Absolute Address:0xFFE00024
Offset:
• 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
1354D–ATARM–08/02
0
1
1
1
1
31
23
15
DRP
ALE
–
–
–
–
7
X
0
0
1
1
0
1
X
0
1
0
1
Read/Write
0
0x24
Valid Address Bits
A20, A21, A22, A23
A20, A21, A22
A20, A21
A20
None
Selected DRP
Standard read protocol for all external memory devices enabled
Early read protocol for all external memory devices enabled
30
22
14
–
–
–
6
–
29
21
13
–
–
–
5
–
Maximum Addressable Space
16M Bytes
8M Bytes
4M Bytes
2M Bytes
1M Byte
DRP
28
20
12
–
–
–
4
27
19
11
–
–
–
–
3
Valid Chip Select
None
CS4
CS4, CS5
CS4, CS5, CS6
CS4, CS5, CS6, CS7
26
18
10
–
–
–
2
EBI_DRP_STANDARD
AT91X40 Series
EBI_DRP_EARLY
Code Label
EBI_DRP
ALE
25
17
–
–
9
–
1
EBI_ALE_16M
EBI_ALE_8M
EBI_ALE_4M
EBI_ALE_2M
EBI_ALE_1M
Code Label
EBI_ALE
24
16
–
–
–
8
0
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