at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 161
at91rm3400
Manufacturer Part Number
at91rm3400
Description
Atmel Advanced At91 Arm Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT91RM3400.pdf
(461 pages)
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ST Real-Time Mode Register
Register Name: ST_RTMR
Access Type:
• 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.
ST Status Register
Register Name:
Access Type:
• 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.
1790A–ATARM–11/03
31
23
15
31
23
15
–
–
7
–
–
–
7
–
Read/Write
ST_SR
Read-only
30
22
14
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
AT91RM3400
25
17
25
17
–
–
9
1
–
–
9
–
1
PITS
24
16
24
16
–
–
8
0
–
–
8
–
0
161
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