TIMER Registers
Revision as of 22:30, 27 September 2014 by Plutooo (talk | contribs) (moved TIMER to TIMER Registers)
Registers
NAME | PHYSICAL ADDRESS | WIDTH |
---|---|---|
REG_TM0VAL | 0x10003000 | 2 |
REG_TM0CNT | 0x10003002 | 2 |
REG_TM1VAL | 0x10003004 | 2 |
REG_TM1CNT | 0x10003006 | 2 |
REG_TM2VAL | 0x10003008 | 2 |
REG_TM2CNT | 0x1000300A | 2 |
REG_TM3VAL | 0x1000300C | 2 |
REG_TM3CNT | 0x1000300E | 2 |
Timer value
Writing to REG_TMxVAL loads a starting value for one of the 4 timers, while reading it will show the current timer value.
Timer control
BIT | DESCRIPTION |
---|---|
0-1 | Prescaler select (0=F/1, 1=F/64, 2=F/256, 3=F/1024) |
2 | Count-up (0=Disabled, 1=Enabled) |
3-5 | Not used |
6 | IRQ enable (0=Disabled, 1=IRQ on timer value overflow) |
7 | Start/Stop (0=Stop, 1=Start) |
Count-up
When count-up is enabled, the timer value will increase every time the previous timer overflows.