HT46R24 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT46R24

A/D Type 8-Bit MCU

Holtek Semiconductor 

HT46R24/HT46C24

I/O

Mode

PD0

PD1

PD2

PD3

I/P

O/P

I/P

(Normal) (Normal) (PWM)

Logical Logical Logical

Input Output Input

O/P

(PWM)

PWM0

PWM1

PWM2

PWM3

It is recommended that unused or not bonded out I/O

lines should be set as output pins by software instruction

to avoid consuming power under input floating state.

PWM

The microcontroller provides 4 channels (6+2)/(7+1)

(depends on options) bits PWM output shared with

PD0/PD1/PD2/PD3. The PWM channels have their data

registers denoted as PWM0 (1AH), PWM1 (1BH),

PWM2 (1CH) and PWM3 (1DH). The frequency source

of the PWM counter comes from fSYS. The PWM regis-

ters are four 8-bit registers. The waveforms of PWM

outputs are as shown. Once the PD0/PD1/PD2/PD3 are

selected as the PWM outputs and the output function of

PD0/PD1/PD2/PD3 are enabled (PDC.0/PDC.1/

PDC.2/PDC.3 =²0²), writing ²1² to PD0/PD1/PD2/PD3

data register will enable the PWM output function and

writing ²0² will force the PD0/PD1/PD2/PD3 to stay at

²0².

A (6+2) bits mode PWM cycle is divided into four modu-

lation cycles (modulation cycle 0~modulation cycle 3).

Each modulation cycle has 64 PWM input clock period.

In a (6+2) bit PWM function, the contents of the PWM

register is divided into two groups. Group 1 of the PWM

register is denoted by DC which is the value of

PWM.7~PWM.2. The group 2 is denoted by AC which is

the value of PWM.1~PWM.0.

fS Y S /2

[P W M ] = 1 0 0

PW M

2 5 /6 4

2 5 /6 4

2 5 /6 4

[P W M ] = 1 0 1

PW M

2 6 /6 4

2 5 /6 4

2 5 /6 4

[P W M ] = 1 0 2

PW M

2 6 /6 4

2 6 /6 4

2 5 /6 4

[P W M ] = 1 0 3

PW M

2 6 /6 4

2 6 /6 4

P W M m o d u la tio n p e r io d : 6 4 /fS Y S

M o d u la tio n c y c le 0

M o d u la tio n c y c le 1

2 6 /6 4

M o d u la tio n c y c le 2

P W M c y c le : 2 5 6 /fS Y S

(6+2) PWM Mode

2 5 /6 4

2 5 /6 4

2 5 /6 4

2 5 /6 4

M o d u la tio n c y c le 3

2 5 /6 4

2 6 /6 4

2 6 /6 4

2 6 /6 4

M o d u la tio n c y c le 0

fS Y S /2

[P W M ] = 1 0 0

PW M

[P W M ] = 1 0 1

PW M

[P W M ] = 1 0 2

PW M

[P W M ] = 1 0 3

PW M

Rev. 2.00

5 0 /1 2 8

5 0 /1 2 8

5 1 /1 2 8

5 0 /1 2 8

5 1 /1 2 8

5 1 /1 2 8

5 2 /1 2 8

P W M m o d u la tio n p e r io d : 1 2 8 /fS Y S

M o d u la tio n c y c le 0

P W M c y c le : 2 5 6 /fS Y S

5 1 /1 2 8

M o d u la tio n c y c le 1

(7+1) PWM Mode

18

5 0 /1 2 8

5 1 /1 2 8

5 1 /1 2 8

5 2 /1 2 8

M o d u la tio n c y c le 0

March 2, 2006

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