SAM3XA RTT
Real-time Timer (RTT) User Interface
Registers
Address | Register | Name | Access | Reset |
---|---|---|---|---|
0x400E1A30 | Mode Register | RTT_MR | read-write | 0x00008000 |
0x400E1A34 | Alarm Register | RTT_AR | read-write | 0xFFFFFFFF |
0x400E1A38 | Value Register | RTT_VR | read-only | 0x00000000 |
0x400E1A3C | Status Register | RTT_SR | read-only | 0x00000000 |
Register Fields
RTT Mode Register
Name: RTT_MR
Access: read-write
Address: 0x400E1A30
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
- | - | - | - | - | - | - | - |
23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
- | - | - | - | - | RTTRST | RTTINCIEN | ALMIEN |
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
RTPRES | |||||||
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
RTPRES |
- RTPRES: Real-time Timer Prescaler Value
- ALMIEN: Alarm Interrupt Enable
Value Name Description 0 - The bit ALMS in RTT_SR has no effect on interrupt. 1 - The bit ALMS in RTT_SR asserts interrupt. - RTTINCIEN: Real-time Timer Increment Interrupt Enable
Value Name Description 0 - The bit RTTINC in RTT_SR has no effect on interrupt. 1 - The bit RTTINC in RTT_SR asserts interrupt. - RTTRST: Real-time Timer Restart
Value Name Description 0 - No effect. 1 - Reloads and restarts the clock divider with the new programmed value. This also resets the 32-bit counter.
-
RTT Alarm Register
Name: RTT_AR
Access: read-write
Address: 0x400E1A34
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
ALMV | |||||||
23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
ALMV | |||||||
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
ALMV | |||||||
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
ALMV |
- ALMV: Alarm Value
-
RTT Value Register
Name: RTT_VR
Access: read-only
Address: 0x400E1A38
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
CRTV | |||||||
23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
CRTV | |||||||
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
CRTV | |||||||
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
CRTV |
- CRTV: Current Real-time Value
-
RTT Status Register
Name: RTT_SR
Access: read-only
Address: 0x400E1A3C
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 |
- | - | - | - | - | - | - | - |
23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
- | - | - | - | - | - | - | - |
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
- | - | - | - | - | - | - | - |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
- | - | - | - | - | - | RTTINC | ALMS |
- ALMS: Real-time Alarm Status
Value Name Description 0 - The Real-time Alarm has not occurred since the last read of RTT_SR. 1 - The Real-time Alarm occurred since the last read of RTT_SR. - RTTINC: Real-time Timer Increment
Value Name Description 0 - The Real-time Timer has not been incremented since the last read of the RTT_SR. 1 - The Real-time Timer has been incremented since the last read of the RTT_SR.