M55800A Atmel Corporation, M55800A Datasheet - Page 25
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
- M40800 PDF datasheet #2
- M55800A PDF datasheet #3
- M55800A PDF datasheet #4
- M55800A PDF datasheet #5
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- Download datasheet (2Mb)
1354D–ATARM–08/02
Byte Select Access is used to connect 16-bit devices in a memory page.
•
•
•
•
Figure 12 shows how to connect a 16-bit device with byte and half-word access (e.g. 16-
bit SRAM) on NCS2.
Figure 12. Connection for a 16-bit Data Bus with Byte and Half-word Access
Figure 13 shows how to connect a 16-bit device without byte access (e.g. Flash) on
NCS2.
Figure 13. Connection for a 16-bit Data Bus without Byte Write Capability.
The signal A0/NLB is used as NLB and enables the lower byte for both read and
write operations.
The signal NWR1/NUB is used as NUB and enables the upper byte for both read
and write operations.
The signal NWR0/NWE is used as NWE and enables writing for byte or half word.
The signal NRD/NOE is used as NOE and enables reading for byte or half word.
EBI
EBI
D8 - D15
A1 - A19
D8 - D15
A1 - A19
D0 - D7
D0 - D7
NCS2
NWE
NCS2
NOE
NUB
NLB
NWE
NOE
NUB
NLB
D0 - D7
D8 - D15
A0 - A18
Write Enable
Output Enable
Memory Enable
D0 - D7
D8 - D15
A0 - A18
Low Byte Enable
High Byte Enable
Write Enable
Output Enable
Memory Enable
AT91X40 Series
25
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