Difference between revisions of "TIMER Registers"
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| Line 43: | Line 43: | ||
= Timer control = | = Timer control = | ||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
| + | |+ REG_TMxCNT | ||
! BIT | ! BIT | ||
! DESCRIPTION | ! DESCRIPTION | ||
Revision as of 22:41, 12 August 2012
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.