MC68HC708MP16 Datasheet, PDF (179/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Pulse Width Modulator for Motor Control (PWMMC)
NOTE: When reading this bit, the value read is the buffer value (not necessarily
the value the output control block is currently using).
PRSC1:PRSC0 — PWM Prescaler Bits
These buffered read/write bits allow the PWM clock frequency to be
modified as shown in Table 9-10.
NOTE: When reading these bits, the value read is the buffer value (not
necessarily the value the PWM generator is currently using).
Table 9-10. PWM Prescaler
Prescaler Bits
PRSC1:PRSC0
PWM Clock Frequency
00
f_op
01
f_op/2
10
f_op/4
11
f_op/8
9.11.6 Dead-Time Write-Once Register
This write-once register holds an 8-bit value which specifies the number
of CPU clock cycles to use for the dead-time when complementary PWM
mode is selected. After this register is written for the first time, it cannot
be rewritten unless a RESET occurs. The dead-time is not affected by
changes to the prescaler value.
Address: $0036
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Write:
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Reset: 1
1
1
1
1
1
1
1
Figure 9-45. Dead-Time Write-Once Register (DEADTM)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor Pulse Width Modulator for Motor Control (PWMMC)
Technical Data
179