MC9S12HY64 Datasheet, PDF (495/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Timer Module (TIM16B8CV2) Block Description
Write: Has no meaning or effect in the normal mode; only writable in special modes (test_mode = 1).
The period of the first count after a write to the TCNT registers may be a different size because the write
is not synchronized with the prescaler clock.
14.3.2.6 Timer System Control Register 1 (TSCR1)
Module Base + 0x0006
7
6
5
4
3
2
1
0
R
0
0
0
TEN
TSWAI
TSFRZ
TFFCA
PRNT
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-12. Timer System Control Register 1 (TSCR1)
Read: Anytime
Write: Anytime
Table 14-6. TSCR1 Field Descriptions
Field
7
TEN
6
TSWAI
5
TSFRZ
Description
Timer Enable
0 Disables the main timer, including the counter. Can be used for reducing power consumption.
1 Allows the timer to function normally.
If for any reason the timer is not active, there is no ÷64 clock for the pulse accumulator because the ÷64 is
generated by the timer prescaler.
Timer Module Stops While in Wait
0 Allows the timer module to continue running during wait.
1 Disables the timer module when the MCU is in the wait mode. Timer interrupts cannot be used to get the MCU
out of wait.
TSWAI also affects pulse accumulator.
Timer Stops While in Freeze Mode
0 Allows the timer counter to continue running while in freeze mode.
1 Disables the timer counter whenever the MCU is in freeze mode. This is useful for emulation.
TSFRZ does not stop the pulse accumulator.
MC9S12HY/HA-Family Reference Manual Rev. 1.04
Freescale Semiconductor
495