HT45RM03 datasheet(32/54 Pages) HOLTEK

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HT45RM03

Rev. 1.10

February 16, 2007

Options

No.

Options

OSC type selection.

This option is to decide if an RC or crystal oscillator is chosen as system clock.

WDT source selection.

There are three types of selection: on-chip RC oscillator, instruction clock or disable the WDT.

CLRWDT times selection.

This option defines how to clear the WDT by instruction.

²One time² means that the CLR WDT instruction can

clear the WDT.

²Two times² means only if both of the CLR WDT1 and CLR WDT2 instructions have been exe-

cuted, then WDT can be cleared.

Wake-up selection.

This option defines the wake-up function activity. External I/O pins (PA only) all have the capability to wake-up

the chip from a HALT.

Pull-high selection.

This option is to decide whether a pull-high resistance is visible or not in the input mode of the I/O ports.

PA0~PA7, PB0~PB7, can be independently selected.

PFD selection:

PD0: level output or PFD output

Low voltage reset selection: Enable or disable LVR function, and LVR voltage selection.

PWM mode selection: 10 (9+1), (8+2) or (7+3) mode

INT0A, INT0B, INT0C and INT1 trigger edge: disable; high to low; low to high or low to high or high to low.

PWM output level selection; PWMLEV.

This option is to determine the PWM output level. Active Low or Active High selection. Disable this bit to

²0², the

PWM output will be defined as an active high output, Enable this bit to

²1², the PWM output will be defined as an

active low output. If the PWM function disable, this bit is invalid.

PWM Complementary output level selection; PWMCLEV.

This option is to determine the PWM Complementary output level. Active low or active high selection. Disable

this bit to

²0², the PWM Complementary output will be defined as an active high output, Enable this bit to ²1²,

the PWM Complementary output will be defined as an active low output. If the PWM Complementary function

disable, this bit is invalid.

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