M42800A Atmel Corporation, M42800A Datasheet - Page 80
M42800A
Manufacturer Part Number
M42800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M42800A.pdf
(224 pages)
4.M42800A.pdf
(27 pages)
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
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13.13 System Timer Real-time Alarm Register
Register Name:
Access Type:
Offset:
Reset Value:
• ALMV: Alarm Value
Defines the Alarm value compared with the Real-time Timer. The maximum delay before ALMS status bit activation is
obtained by programming ALMV to 0x0 corresponding to 1048576 seconds.
13.14 System Timer Current Real-time Register
Register Name:
Access Type:
Offset:
Reset Value:
• CRTV: Current Real-time Value
Returns the current value of the Real-time Timer.
80
31
23
15
31
23
15
–
7
–
7
AT91M42800A
ST_RTAR
Read/Write
0x20
0x0
30
22
14
ST_CRTR
Read-only
0x24
0x0
30
22
14
–
6
–
6
29
21
13
29
21
13
–
5
–
5
28
20
12
28
20
12
–
4
–
4
ALMV
ALMV
ALMV
CRTV
CRTV
CRTV
27
19
11
27
19
11
–
3
–
3
26
18
10
26
18
10
–
2
–
2
25
17
25
17
–
9
1
–
9
1
1779D–ATARM–14-Apr-06
24
16
24
16
–
8
0
–
8
0
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