Standard Type Tm - Stm - Holtek HT66F20-1 Manual

HT66F20-1/HT66F30-1/HT68F20-1/HT68F30-1
Flash MCU with EEPROM
Standard Type TM – STM
The Standard Type TM contains five operating modes, which are Compare Match Output, Timer/
Event Counter, Capture Input, Single Pulse Output and PWM Output modes. The Standard TM can
also be controlled with an external input pin and can drive two external output pins. The Standard
Type TM is only contained in the HT66F20-1 and HT68F20-1 devices.
Device
HT��F�0-1/HT�8F�0-1
HT��F�0-1/HT�8F�0-1
f / 4 0 0 0
S Y S
f 0 0 1
S Y S
f / 1 6 0 1 0
H
f / 6 4
0 1 1
H
f
1 0 0
T B C
R e s e r v e d
1 0 1
1 1 0
T n O N
T C K n 1 1 1
T n P A U
T n C K 2 ~ T n C K 0
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 or sixteen 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.
Rev. 1.40
TM Type
10-�it STM
―
C C R P
C o m p a r a t o r P M a t c h
3 - b i t C o m p a r a t o r P
b 7 ~ b 9
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 C C L R
b 0 ~ b 9
C o m p a r a t o r A M a t c h
1 0 - b i t
C o m p a r a t o r A
C C R A
HT66F20-1/HT68F20-1 Standard Type TM Block Diagram (n=1)
9�
TM Name TM Input Pin
TM1 TCK1
― ―
T n P F I n t e r r u p t
T n O C
O u t p u t P o l a r i t y
0
C o n t r o l C o n t r o l
1
T n M 1 , T n M 0 T n P O L
T n I O 1 , T n I O 0
T n A F I n t e r r u p t
T n I O 1 , T n I O 0
E d g e
D e t e c t o r
�ove��e� ��� �01�
TM Output Pin
TP1_0� TP1_1
―
T P n _ 0
T P n P i n
I n p u t / O u t p u t
T P n _ 1