HT66F13 datasheet(128/173 Pages) HOLTEK

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TBC Register

Bit

76543210

Name

TBON

TBCK

TB1

TB0

¾¾¾¾

R/W

¾¾¾¾

POR

0011

¾¾¾¾

Bit 7

TBON: Time Base control

0: disable

1: enable

Bit 6

TBCK: Time Base clock f

TB selection

0: f

TBC

1: f

SYS/4

Bit 5~4

TB1~TB0: Select Time Base Time-out Period

00: 4096/f

01: 8192/f

10: 16384/f

11: 32768/f

Bit 3~0

unimplemented, read as

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.

TM Interrupts

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 HT66F13. 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.

HT66F13/HT66F14/HT66F15

Enhanced A/D Flash Type MCU

Rev. 1.10

128

February 9, 2011

HT66F13 Datasheet(PDF) 128 Page - Holtek Semiconductor Inc

HT66F13 Datasheet(HTML) 128 Page - Holtek Semiconductor Inc

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