M42800A Atmel Corporation, M42800A Datasheet - Page 52

• Manufacturer Part Number: M42800A
• Manufacturer: Atmel Corporation

Specifications of M42800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 54
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

11.16 EBI Memory Control Register
Register Name:
Access Type:
Reset Value:
Absolute Address: 0xFFE00024
• 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
52
0
1
1
1
1
DRP
0
1
31
23
15
–
–
–
7
–
ALE
X
0
0
1
1
AT91M42800A
X
0
1
0
1
Selected DRP
Standard read protocol for all external memory devices enabled
Early read protocol for all external memory devices enabled
Valid Address Bits
A20, A21, A22, A23
EBI_MCR
Read/Write
See
30
22
14
–
–
–
6
–
A20, A21, A22
A20, A21
Table 11-4
None
A20
29
21
13
–
–
–
5
–
Maximum Addressable Space
DRP
28
20
12
–
–
–
4
16M Bytes
8M Bytes
4M Bytes
2M Bytes
1M Byte
27
19
11
–
–
–
3
–
CS4, CS5, CS6, CS7
Valid Chip Select
CS4, CS5, CS6
CS4, CS5
26
18
10
–
–
–
2
None
CS4
Code Label: EBI_DRP
EBI_DRP_STANDARD
EBI_DRP_EARLY
ALE
25
17
–
–
9
–
1
Code Label: EBI_ALE
1779D–ATARM–14-Apr-06
EBI_ALE_16M
EBI_ALE_8M
EBI_ALE_4M
EBI_ALE_2M
EBI_ALE_1M
24
16
–
–
8
–
0