HT68F03 datasheet(55/139 Pages) HOLTEK

55 / 139 page

HT66F03/HT66F04/HT68F03/HT68F04

Rev. 1.00

April 16, 2010

Compact Type TM

Although the simplest form of the three TM types, the Compact TM type still contains three operating modes, which are

Compare Match Output, Timer/Event Counter and PWM Output modes. The Compact TM can also be controlled with

an external input pin and can drive one or two external output pin. These two external output pins can be the same sig-

nal or the inverse signal.

CTM

Name

TM No.

TM Input Pin

TM Output Pin

All devices

10-bit CTM

TCK0

TP0

Compact TM Operation

At its core is a 10-bit count-up counter which is driven by a user selectable internal or external clock source. There are

also two internal comparators with the names, Comparator A and Comparator P. These comparators will compare the

value in the counter with CCRP and CCRA registers. The CCRP is three bits wide whose value is compared with the

highest three bits in the counter while the CCRA is the ten bits and therefore compares with all counter bits.

The only way of changing the value of the 10-bit counter using the application program, is to clear the counter by chang-

ing the TnON bit from low to high. The counter will also be cleared automatically by a counter overflow or a compare

match with one of its associated comparators. When these conditions occur, a TM interrupt signal will also usually be

generated. The Compact Type TM can operate in a number of different operational modes, can be driven by different

clock sources including an input pin and can also control an output pin. All operating setup conditions are selected us-

ing relevant internal registers.

C C R P

C C R A

T n C C L R

C o m p a r a t o r P M a t c h

C o m p a r a t o r A M a t c h

T n C K 2 ~ T n C K 0

T n O N

T n P A U

b 7 ~ b 9

3 - b i t C o m p a r a t o r P

T C K n

1 0 - b i t C o m p a r a t o r A

C o u n t e r C l e a r

1 0 - b i t C o u n t - u p C o u n t e r

T n P F I n t e r r u p t

T n A F I n t e r r u p t

b 0 ~ b 9

T n M 1 , T n M 0

T n I O 1 , T n I O 0

T n P O L

T n O C

P o l a r i t y

C o n t r o l

O u t p u t

C o n t r o l

T P n

1 1 1

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

f S Y S / 4

f S Y S

f H / 1 6

f H / 6 4

f T B C

R e s e r v e d

Compact Type TM Block Diagram

HT68F03 Datasheet(PDF) 55 Page - Holtek Semiconductor Inc

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