HT46R01 datasheet(45/60 Pages) HOLTEK

45 / 60 page

Application Circuits

HT46R01/HT46R02/HT46R03

Rev. 1.00

September 21, 2007

Configuration Options

Configuration options refer to certain options within the MCU that are programmed into the OTP Program Memory de-

vice during the programming 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 by the application software. All options must be defined for proper

system function, the details of which are shown in the table.

No.

Options

Watchdog Timer: enable or disable

Watchdog Timer clock source: WDT internal oscillator, fSYS/4 or RTC

CLRWDT instructions: 1 or 2 instructions

System oscillator: Internal RC, Internal RC with external RTC, External Crystal, External RC

LVR function: enable or disable

LVR voltage: 2.1V, 3.15V or 4.2V

RES or PA7

SST: enable or disable

H T 4 6 R 0 1 / H T 4 6 R 0 2 / H T 4 6 R 0 3

O S C 1

O S C 2

C r y s t a l / R e s o n a t o r

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

R 1

C 1

C 2

R C S y s t e m O s c i l l a t o r

2 4 k W < R O S C < 1 . 5 M W

V D D

R O S C

O S C 1

P A 5

4 7 0 p F

O S C C i r c u i t

R E S / P A 7

P A 0 / A N 0

P A 1 / P F D / A N 1

P A 2 / T M R 0 / A N 2

P A 3 / I N T / A N 3

P A 4 / T M R 1 / P W M

I n t e r n a l R C O s c i l l a t o r

+ E x t e r n a l R T C O S C

I n t e r n a l R C O s c i l l a t o r

P A 5 / P A 6 r e m a i n a s

I / O p i n s

P A 5

P A 6

O S C 1

1 0 p F

3 2 7 6 8 H z

O S C 2

F o r d e t a i l s r e g a r d i n g

C 1 , C 2 a n d R 1 s e e

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

O S C 1

O S C 2

O S C

C i r c u i t

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

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