HT46R652 datasheet(21/47 Pages) HOLTEK

21 / 47 page

HT46R652

Rev. 1.00

December 19, 2006

tion timer. If the pins are setup as inputs then they will al-

ways retain their input function. Once the BZ/BZ

configuration option is selected, the buzzer output sig-

nal is controlled by the PA0/PA1 data register.

The PA0/PA1 pins I/O functions are shown in the table.

PA0 I/O

OOOOOOOO

PA1 I/O

OOOOO

PA0 Mode

BBBB

PA1 Mode

C C C

PA0 Data

1 D0 0101

PA1 Data

X D1 D D

PA0 Pad Status

B D0 0B0B

PA1 Pad Status

I D1 DD 0 B

Note:

²I² input; ²O² output; ²D, D0, D1² Data

²B² buzzer option, BZ or BZ

²X² don¢t care; ²C² CMOS output

The PB port is also used for the A/D converter inputs.

The PWM outputs are shared with pins PC0~PC7 and

PD0~PD7. If the PWM function is enabled, the

PWM0~PWM15 outputs will appear on pins PC0~PC7

and PD0~PD7, if PC0~PC7 and PD0~PD7 are setup as

outputs. Writing a

²1² to the PC0~PC7 and PD0~PD7

data registers will enable the PWM output function while

writing a

²0² will force PC0~PC7 and PD0~PD7 to re-

main at a

²0²level. The I/O functions of PC0~PC7 and

PD0~PD7 are shown in the table.

I/O

Mode

I/P

(Normal)

O/P

(Normal)

I/P

(PWM)

O/P

(PWM)

PC0~PC7,

PD0~PD7

Logical

Input

Logical

Output

Logical

Input

PWM0~

PWM15

Any unused pins must be carefully managed to ensure

that there are no floating input lines which will result in in-

creased power consumption. It is therefore recom-

mended that any unused pins are setup as outputs or

connected to a pull-high resistor if setup as inputs.

The definitions of the PFD control signals and the PFD

output frequencies are listed in the following table.

Timer

Preload

Value

PA3

Data

PA3

Pad

State

PFD

Frequency

OFF

PFD

fTMR/[2

´(M-N)]

Note:

²X² stands for unused

²U² stands for unknown

²M² is ²65536² for PFD0 or PFD1

²N² is the timer/event counter preload value

²fTMR² is the input clock frequency for the

timer/event counter

V D D

P F D E N

( P A 3 )

O P 0 ~ O P 7

T M R 0 f o r P A 4 o n l y

I N T 0 f o r P A 5 o n l y

I N T 1 f o r P A 6 o n l y

T M R 1 f o r P A 7 o n l y

S y s t e m W a k e - u p

( P A o n l y )

R e a d D a t a R e g i s t e r

P A 0 / P A 1 / P A 3 / P C 0 ~ P C 7 / P D 0 ~ P D 7

C K

C o n t r o l B i t

P U

D a t a B u s

W r i t e C o n t r o l R e g i s t e r

C h i p R e s e t

R e a d C o n t r o l R e g i s t e r

W r i t e D a t a R e g i s t e r

D a t a B i t

P A 0 / B Z

P A 1 / B Z

P A 2

P A 3 / P F D

P A 4 / T M R 0

P A 5 / I N T 0

P A 6 / I N T 1

P A 7 / T M R 1

P B 0 / A N 0 ~ P B 7 / A N 7

P C 0 / P W M 0 ~ P C 7 / P W M 7

P D 0 / P W M 8 ~ P D 7 / P W M 1 5

B Z / B Z / P F D / P W M 0 ~ P W M 7 / P W M 8 ~ P W M 1 5

Input/Output Ports

HT46R652 データシート(PDF) 21 Page - Holtek Semiconductor Inc

HT46R652 データシート(HTML) 21 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

データシートダウンロード

リンク URL

HT46R652 データシート(PDF) 21 Page - Holtek Semiconductor Inc

HT46R652 データシート(HTML) 21 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

データシート ダウンロード

リンク URL

データシートダウンロード