M42800A Atmel Corporation, M42800A Datasheet - Page 74

• 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

13.4
System Timer Base Address: 0xFFFF8000
Table 5. System Timer Registers
Note:
13.5
Register Name:
Access Type:
Offset:
• WDRST: Watchdog Timer Restart
0 = No effect.
1 = Reload the start-up value in the Watchdog Timer.
74
Offset
0x00
0x04
0x08
0x0C
0x10
0x14
0x18
0x1C
0x20
0x24
31
23
15
–
–
–
7
–
System Timer User Interface
1. Corresponds to maximum value of the counter.
System Timer Control Register
AT91M42800A
Register Name
Control Register
Period Interval Mode Register
Watchdog Mode Register
Real-time Mode Register
Status Register
Interrupt Enable Register
Interrupt Disable Register
Interrupt Mask Register
Real-time Alarm Register
Current Real-time Register
ST_CR
Write-only
0x00
30
22
14
–
–
–
6
–
29
21
13
–
–
–
5
–
28
20
12
–
–
–
4
–
Register
Mnemonic
ST_CR
ST_PIMR
ST_WDMR
ST_RTMR
ST_SR
ST_IER
ST_IDR
ST_IMR
ST_RTAR
ST_CRTR
27
19
11
–
–
–
3
–
26
18
10
–
–
–
2
–
Access
W
R/W
R/W
R/W
R
W
W
R
R/W
R
25
17
–
–
9
–
1
–
1779D–ATARM–14-Apr-06
0x00000000
0x00020000
Reset Value
0x00008000
0x0
0x0
0x0
WDRST
–
–
–
–
24
16
–
–
8
–
0
(1)
(1)