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HT68F13 Datasheet(PDF) 116 Page - Holtek Semiconductor Inc |
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HT68F13 Datasheet(HTML) 116 Page - Holtek Semiconductor Inc |
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116 / 161 page  TBC Register Bit 7 6 5 4 3 2 1 0 Name TBON TBCK TB1 TB0 ¾ ¾ ¾ ¾ R/W R/W R/W R/W R/W ¾ ¾ ¾ ¾ POR 0 0 1 1 ¾ ¾ ¾ ¾ Bit7 TBON:TimeBasecontrol 0:disable 1:enable Bit6 TBCK:TimeBaseclock f TB selection 0: f TBC 1: f SYS/4 Bit5~4 TB1~TB0:SelectTimeBaseTime-outPeriod 00:4096/f TB 01:8192/f TB 10:16384/f TB 11:32768/f TB Bit3~0 unimplemented,readas ²0² LVD Interrupt The Low Voltage Detector Interrupt is contained within the Multi-function Interrupt. A LVD Interrupt request will take place when the LVD Interrupt request flag, LVF, is set, which occurs when the Low Voltage Detector function detects a low power supply voltage. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, Low Voltage Interrupt enable bit, LVE, and associated Multi-function interrupt enable bit, must first be set. When the interrupt is enabled, the stack is not full and a low voltage condition occurs, a subroutine call to the Multi-function Interrupt vector, will take place. When the Low Voltage Interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts, however only the Multi-function interrupt request flag will be also automatically cleared. As the LVF flag will not be automatically cleared, it has to be cleared by the application program. TMInterrupts The Compact and Standard Type TMs have two interrupts each, while the Enhanced Type TM has three interrupts. All of the TM interrupts are contained within the Multi-function Interrupts in these devices except HT68F13. For each of the Compact and Standard Type TMs there are two interrupt request flags TnPF and TnAF and two enable bits TnPE and TnAE. For the Enhanced Type TM there are three interrupt request flags TnPF, TnAF and TnBF and three enable bits TnPE, TnAE and TnBE. A TM interrupt request will take place when any of the TM request flags are set, a situation which occurs when a TM comparator P, A or B match situation happens. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, respective TM Interrupt enable bit, and relevant Multi-function Interrupt enable bit, MFnE, must first be set. When the interrupt is enabled, the stack is not full and a TM comparator match situation occurs, a subroutine call to the relevant Multi-function Interrupt vector locations, will take place. When the TM interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts, however only the related MFnF flag will be automatically cleared. As the TM interrupt request flags will not be automatically cleared, they have to be cleared by the application program. HT68F13/HT68F14/HT68F15 EnhancedI/OFlashTypeMCU Rev.1.10 116 February9,2011 |
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