HT83F02 datasheet(20/64 Pages) HOLTEK

20 / 64 page

HT83F02

Rev. 1.20

November 19, 2010

Pin-shared Functions

The flexibility of the microcontroller range is greatly en-

hanced by the use of pins that have more than one func-

tion. Limited numbers of pins can force serious design

constraints on designers but by supplying pins with

multi-functions, many of these difficulties can be over-

come. For some pins, the chosen function of the

multi-function I/O pins is set by configuration options

while for others the function is set by application pro-

gram control.

· Serial interface module

The device pins, PB0~PB3, are pin-shared with pins

SDAB, SCLB, SCSB, SCKB, SDIB, SDOB. The

choice of which function is used is selected using the

SIMC0B register.

· Serial interface module

The device pins, PB4~PB7, are pin-shared with pins

SDAA, SCLA, SCSA, SCKA, SDIA, SDOA. The

choice of which function is used is selected using the

SIMC0A register.

· I/O pin structures

The following diagrams illustrate the I/O pin internal

structures. As the exact logical construction of the I/O

pin may differ from these drawings, they are supplied

as a guide only to assist with the functional under-

standing of the I/O pins.

Note also that the specified pins refer to the largest

device package, therefore not all pins specified will

exist on all devices.

V D D

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

C K

C o n t r o l B i t

P u l l - H i g h

O p t i o n

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

A n a l o g S w i t c h O p t i o n

W e a k

P u l l - u p

P B 0 / S D O B / S D A B

P B 1 / S C K B / S C L B

P B 2 / S D I B

P B 3 / S C S B

P B 4 / S D O A / S D A A

P B 5 / S C K A / S C L A

P B 6 / S D I A

P B 7 / S C S A

P B 0 / S D O B / S D A B

P B 1 / S C K B / S C L B

P B 2 / S D I B

P B 3 / S C S B

P B 4 / S D O A / S D A A

P B 5 / S C K A / S C L A

P B 6 / S D I A

P B 7 / S C S A

PB Input/Output Port

W a k e - u p O p t i o n

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

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

C o n t r o l B i t

P u l l - H i g h

O p t i o n

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 ~ P A 7

W e a k

P u l l - u p

C K

V D D

PA Input/Output Port

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