HT46F49E datasheet(56/88 Pages) HOLTEK

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Application Circuits

HT46F46E/HT46F47E/HT46F48E/HT46F49E

Rev. 1.40

July 28, 2009

Configuration Options

Configuration options refer to certain options within the MCU that are programmed into the device during the program-

ming process. During the development process, these options are selected using the HT-IDE software development

tools. As these options are programmed into the device using the hardware programming tools, once they are selected

they cannot be changed later as the application software has no control over the configuration options. All options must

be defined for proper system function, the details of which are shown in the table.

No.

Options

Watchdog Timer clock source: WDT oscillator or fSYS/4

Watchdog Timer function: enable or disable

WDT time-out period: 2

13/f

S,2

14/f

S,2

15/f

S,or2

16/f

CLRWDT instructions: 1 or 2 instructions

System oscillator: Crystal or RC

PA, PB and PD: pull-high enable or disable

PC: pull-high enable or disable - HT46F48E and HT46F49E only

PWM: enable or disable - Except HT46F49E

PWM0, PWM1: enable or disable - HT46F49E only

PWM mode: 6+2 or 7+1 mode selection

PA0~PA7: wake-up enable or disable - bit option

PFD: normal I/O or PFD output

LVR function: enable or disable

Low voltage reset voltage: 2.1V, 3.15V or 4.2V

External interrupt INT trigger edge: disable, rising, falling, or double (rising or falling)

P D 0 / P W M

P B 0 / A N 0 ~ P B 3 / A N 3

P B 4 ~ P B 7

P A 0 ~ P A 2

P A 3 / P F D

P A 4 / T M R

P A 5 / I N T

P A 6 ~ P A 7

P C 0 ~ P C 4

R E S

0 . 1 m F

1 0 0 k W

V D D

V S S

0 . 1 m F

V D D

R e s e t

C i r c u i t

O S C 1

O S C 2

O S C

C i r c u i t

S e e O s c i l l a t o r

S e c t i o n

HT46F49E Datasheet(PDF) 56 Page - Holtek Semiconductor Inc

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