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HT68FU50 数据表(PDF) 115 Page - Holtek Semiconductor Inc |
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HT68FU50 数据表(HTML) 115 Page - Holtek Semiconductor Inc |
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115 / 244 page  HT68F20/HT68F30/HT68F40/HT68F50/HT68F60 HT68FU30/HT68FU40/HT68FU50/HT68FU60 Rev. 1.50 115 March 15, 2011 Enhanced Type TM - ETM The Enhanced 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 Enhanced TM can also be controlled with an external in- put pin and can drive three or four external output pins. CTM Name TM No. TM Input Pin TM Output Pin HT68F20 ¾¾ ¾ ¾ HT68F30 10-bit ETM 1 TCK1 TP1A; TP1B_0, TP1B_1 HT68F40 10-bit ETM 1 TCK1 TP1A, TP1B_0, TP1B_1, TP1B_2 HT68F50 10-bit ETM 1 TCK1 TP1A, TP1B_0, TP1B_1, TP1B_2 HT68F60 10-bit ETM 1 TCK1 TP1A, TP1B_0, TP1B_1, TP1B_2 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 U p / D o w n 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 A P i n I n p u t / O u t p u t b 0 ~ b 9 E d g e D e t e c t o r T n A I O 1 , T n A I O 0 T n A M 1 , T n A M 0 T n A I O 1 , T n A I O 0 T n A P O L T n A 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 A 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 T n B F I n t e r r u p t T P n B P i n I n p u t / O u t p u t T n B M 1 , T n B M 0 T n B I O 1 , T n B I O 0 T n B P O L T n B 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 C C R B C o m p a r a t o r B M a t c h 1 0 - b i t C o m p a r a t o r B E d g e D e t e c t o r T n I O 1 , T n I O 0 T P n B - 0 T P n B - 1 T P n B - 2 0 1 Enhanced Type TM Block Diagram Enhanced TM Operation At its core is a 10-bit count-up/count-down counter which is driven by a user selectable internal or external clock source. There are three internal comparators with the names, Comparator A, Comparator B and Com- parator P. These comparators will compare the value in the counter with the CCRA, CCRB and CCRP registers. The CCRP comparator is 3-bits wide whose value is compared with the highest 3-bits in the counter while CCRA and CCRB are 10-bits wide and therefore com- pared 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 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 Enhanced 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 output pins. All operating setup conditions are selected using relevant internal registers. |
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