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HT68FU50 数据表(PDF) 99 Page - Holtek Semiconductor Inc |
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HT68FU50 数据表(HTML) 99 Page - Holtek Semiconductor Inc |
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99 / 244 page  HT68F20/HT68F30/HT68F40/HT68F50/HT68F60 HT68FU30/HT68FU40/HT68FU50/HT68FU60 Rev. 1.50 99 March 15, 2011 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 pins. CTM Name TM No. TM Input Pin TM Output Pin HT68F20 10-bit STM 1 TCK1 TP1_0, TP1_1 HT68F30 ¾¾¾¾ HT68F40 16-bit STM 2 TCK2 TP2_0, TP2_1 HT68F50 16-bit STM 2 TCK2 TP2_0, TP2_1 HT68F60 16-bit STM 2 TCK2 TP2_0, TP2_1 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 o r b 8 ~ b 1 5 3 o r 8 - b i t C o m p a r a t o r P 1 0 o r 1 6 - 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 o r 1 6 - 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 T P n P i n I n p u t / O u t p u t b 0 ~ b 9 o r b 0 ~ b 1 5 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 _ 0 T P n _ 1 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 0 1 Standard Type TM Block Diagram Standard TM Operation There are two sizes of Standard TMs, one is 10-bits wide and the other is 16-bits wide. At the core is a 10 or 16-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, Com- parator A and Comparator P. These comparators will compare the value in the counter with CCRP and CCRA registers. The CCRP comparator is 3 or 8-bits wide whose value is compared the with highest 3 or 8 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 or 16-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 inter- rupt signal will also usually be generated. The Standard Type TM can operate in a number of different opera- tional 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 rele- vant 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 or 16-bit value, while a read/write register pair exists to store the internal 10 or 16-bit CCRA value. The remaining two registers are control registers which setup the different operating and control modes as well as the three or eight CCRP bits. |
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