M42800A Atmel Corporation, M42800A Datasheet - Page 76

• 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

13.8
Register Name:
Access Type:
Offset:
Reset Value:
• RTPRES: Real-time Timer Prescaler Value
Defines the number of SLCK periods required to increment the Real-time Timer. The maximum period is obtained by pro-
gramming RTPRES to 0x0 corresponding to 65536 Slow Clock cycles.
13.9
Register Name:
Access Type:
Offset:
• PITS: Period Interval Timer Status
0 = The Period Interval Timer has not reached 0 since the last read of the Status Register.
1 = The Period Interval Timer has reached 0 since the last read of the Status Register.
• WDOVF: Watchdog Overflow
0 = The Watchdog Timer has not reached 0 since the last read of the Status Register.
1 = The Watchdog Timer has reached 0 since the last read of the Status Register.
• RTTINC: Real-time Timer Increment
0 = The Real-time Timer has not been incremented since the last read of the Status Register.
1 = The Real-time Timer has been incremented since the last read of the Status Register.
• ALMS: Alarm Status
0 = No alarm compare has been detected since the last read of the Status Register.
1 = Alarm compare has been detected since the last read of the Status Register.
76
31
23
15
31
23
15
–
–
7
–
–
–
7
–
System Timer Real-time Mode Register
System Timer Status Register
AT91M42800A
ST_RTMR
Read/Write
0x0C
0x0000 8000
30
22
14
ST_SR
Read-only
0x10
30
22
14
–
–
6
–
–
–
6
–
29
21
13
29
21
13
–
–
5
–
–
–
5
–
28
20
12
28
20
12
–
–
4
–
–
–
4
–
RTPRES
RTPRES
ALMS
27
19
11
27
19
11
–
–
3
–
–
–
3
RTTINC
26
18
10
26
18
10
–
–
2
–
–
–
2
WDOVF
25
17
25
17
–
–
9
1
–
–
9
–
1
1779D–ATARM–14-Apr-06
PITS
24
16
24
16
–
–
8
0
–
–
8
–
0