HT68F03 datasheet(64/139 Pages) HOLTEK

64 / 139 page

HT66F03/HT66F04/HT68F03/HT68F04

Rev. 1.00

April 16, 2010

Standard Type TM - STM

The Standard Type TM contains five operating modes, which are Compare Match Output, Timer/Event Counter, Cap-

ture Input, Single Pulse Output and PWM Output modes. The Standard TM can also be controlled with an external in-

put pin and can drive one or two external output pin.

CTM

Name

TM No.

TM Input Pin

TM Output Pin

All devices

10-bit STM

TCK1

TP1

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

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

E d g e

D e t e c t o r

T n I O 1 , T n I O 0

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

T C K 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

Standard Type TM Block Diagram

Standard TM Operation

At the 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 comparator is 3-bit wide

whose value is compared the with highest 3 bits in the

counter while the CCRA is the ten bits and therefore

compares 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

changing 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 Standard 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 using relevant internal

registers.

Standard Type TM Register Description

Overall operation of the Standard TM is controlled using

a series of registers. A read only register pair exists to

store the internal counter 10-bit value, while a read/write

value. The remaining two registers are control registers

which setup the different operating and control modes

as well as the three CCRP bits.

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