M55800A Atmel Corporation, M55800A Datasheet - Page 24
M55800A
Manufacturer Part Number
M55800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M55800A.pdf
(29 pages)
4.M55800A.pdf
(256 pages)
5.M55800A.pdf
(28 pages)
Specifications of M55800A
Flash (kbytes)
0 Kbytes
Pin Count
176
Max. Operating Frequency
33 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
58
Ext Interrupts
58
Usb Speed
No
Usb Interface
No
Spi
1
Uart
3
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
72
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
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
- M40800 PDF datasheet
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- M55800A PDF datasheet #3
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- M55800A PDF datasheet #5
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11. EBI: External Bus Interface
24
AT91M5880A
The EBI generates the signals that control the access to the external memory or peripheral
devices. The EBI is fully-programmable and can address up to 128M bytes. It has eight chip
selects and a 24-bit address bus.
The 16-bit data bus can be configured to interface with 8- or 16-bit external devices. Separate
read and write control signals allow for direct memory and peripheral interfacing.
The EBI supports different access protocols allowing single-clock cycle memory accesses.
The main features are:
The EBI User Interface is described on
• External memory mapping
• 8 active-low chip select lines
• 8- or 16-bit data bus
• Byte-write or byte-select lines
• Remap of boot memory
• Two different read protocols
• Programmable wait state generation
• External wait request
• Programmable data float time
page
48.
1745F–ATARM–06-Sep-07
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