HT68F016 datasheet(49/116 Pages) HOLTEK

49 / 116 page

HT66F016/HT66F017/HT68F016/HT68F017

Rev. 1.00

May 14, 2012

The power-on reset condition of the A/D converter con-

trol registers ensures that any A/D input pins - which are

always shared with other I/O functions - will be setup as

analog inputs after a reset. Although these pins will be

configured as A/D inputs after a reset, the A/D converter

will not be switched on. It is therefore important to note

that if it is required to use these pins as I/O digital input

pins or as other functions, the A/D converter control reg-

isters must be correctly programmed to remove the A/D

function. Note also that as the A/D channel is enabled,

any internal pull-high resistor connections will be re-

moved.

Port A has the additional capability of providing wake-up

functions. When the device is in the SLEEP or IDLE

Mode, various methods are available to wake the device

up. One of these is a high to low transition of any of the

Port A pins. Single or multiple pins on Port A can be

setup to have this function.

V D D

W a k e - u p S e l e c t

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 K

C o n t r o l B i t

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

I / O p i n

P A o n l y

W e a k

P u l l - u p

P u l l - H i g h

R e g i s t e r

S e l e c t

Generic Input/Output Structure

V D D

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

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 / D I n p u t P i n s

A C S 1 ~ A C S 0

T o A / D C o n v e r t e r

W e a k

P u l l - u p

A n a l o g

I n p u t

S e l e c t o r

C K

P u l l - H i g h

R e g i s t e r

S e l e c t

A/D Input/Output Structure

HT68F016 Datasheet(PDF) 49 Page - Holtek Semiconductor Inc

HT68F016 Datasheet(HTML) 49 Page - Holtek Semiconductor Inc

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