Difference between revisions of "TIMER Registers"
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| − | + | There are 3 timers. | |
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| + | = Registers = | ||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
| − | ! | + | ! Old3DS |
| − | ! | + | ! Name |
| − | ! | + | ! Address |
| + | ! Width | ||
| + | ! Used by | ||
|- | |- | ||
| − | | | + | | style="background: green" | Yes |
| − | | 0x10003000 | + | | TIMER_VAL(n) |
| + | | 0x10003000 + 4*n | ||
| 2 | | 2 | ||
| + | | | ||
|- | |- | ||
| − | | | + | | style="background: green" | Yes |
| − | | | + | | TIMER_CNT(n) |
| − | | | + | | 0x10003002 + 4*n |
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Revision as of 23:42, 19 March 2015
There are 3 timers.
Registers
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | TIMER_VAL(n) | 0x10003000 + 4*n | 2 | |
| Yes | TIMER_CNT(n) | 0x10003002 + 4*n | 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.