Datasheet

DocID024647 Rev 1 61/138
RM0352 ARM
©
dual timer module (SP804)
137
Control register, TimerXControl
The bit assignments of the control register are listed in Table 53.
Caution: The counter mode, size or prescale settings must not be changed while the Timer module is
running. If a new configuration is required then the Timer module must be disabled and then
the new configuration values written to the appropriate registers. The Timer module must
then be re-enabled after the configuration changes are complete. Failure to follow this
procedure can result in unpredictable behavior of the device.
Interrupt clear register. TimerXIntClr
Any write to this register, clears the interrupt output from the counter.
Table 53. Control register bit assignments
Bits Name Type Function
[31:8] - - RESERVED bits, do not modify, and ignore on read
[7] TimerEn Read/write
Enable bit:
0 = timer module disabled (default)
1 = timer module enabled.
[6] TimerMode Read/write
Mode bit:
0 = timer module is in free running mode (default)
1 = Timer module is in periodic mode.
[5] IntEnable Read/write
Interrupt Enable bit:
0 = timer module Interrupt disabled
1 = timer module Interrupt enabled (default).
[4] - - RESERVED bit, do not modify, and ignore on read
[3:2] TimerPre Read/write
Prescale bits:
00 = 0 stages of prescale, clock is divided by 1 (default)
01 = 4 stages of prescale, clock is divided by 16
10 = 8 stages of prescale, clock is divided by 256
11 = Undefined, do not use.
[1] TimerSize Read/write
Selects 16/32 bit counter operation:
0 = 16-bit counter (default)
1 = 32-bit counter.
[0] OneShot Read/write
Selects one-shot or wrapping counter mode:
0 = wrapping mode (default)
1 = one-shot mode.