HT45RM03 datasheet(30/54 Pages) HOLTEK

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HT45RM03

Rev. 1.10

February 16, 2007

Bit No.

Label

Function

0~3

AOF0~AOF3 Operational amplifier input offset voltage cancellation control bits

ARS

Operational amplifier input offset voltage cancellation reference selection bit

1/0: select OPP/OPN as the reference input

AOFM

Input offset voltage cancellation mode and operational amplifier mode selection

1/0: input offset voltage cancellation mode/operational amplifier mode

OPAOP

Operational amplifier output; positive logic. This bit is read only.

OPAEN

Operational amplifier enable/disable (1/0)

OPAC Register (Operational Amplifier Control Register)

OPAEN

PA0, PA3/AN3, PB2/AN2

PA0 is GPIO and PB2/AN2, PB3/AN3 is GPIO or analog ADC input by ADCR register.

PA0, PB3/AN3 is OPA input pin and PB2/AN2 is OPA output pin. The PB2/AN2 and PB3/AN3 can be ana-

log ADC input if the related ADC function is enabled.

Miscellaneous Register

There is one miscellaneous control registers for various functions. The Miscellaneous register is to enable/disable

Comparator, enable/disable OPA, enable/disable Comparator COUT pin, enable/disable stopping PWM by hardware.

Bit No.

Label

Function

PWMLEV

This bit is read only. It

¢s is the PWM output level option.

0: PWM output will be defined as an active high

1: PWM output will be defined as an active low

If the PWM function disable, this bit is invalid.

PWMCLEV

This bit is read only. It

¢s is the PWM output level option.

0: PWM output will be defined as an active high

1: PWM output will be defined as an active low

If the PWM function disable, this bit is invalid.

PWMSP0

Stopping the PWM and PWM using hardware selection

00: PWM module output can be stop by software control only

01: PWM module output can be stop by COUT falling edge

10: PWM module output can be stop by INT1 interrupt

11: PWM module output can be stop by COUT falling edge or by INT1 interrupt

PWMSP1

PWMCTRL To active/inactive PWM and PWM Complementary output (0=inactive; 1=active)

COUTEN

PA3/COUT selection

0: PA3/COUT is as a GPIO pin

1: PA3/COUT is Comparator output, and the status of COUT can be read by reading

the PA3 register.

COUTR

Comparator output flag. This bit is read only

0: Comparator output is low state

1: Comparator output is high state

Unused bit, read as

²0²

MISC (1DH) Register

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