HT48R01A datasheet(2/49 Pages) HOLTEK

2 / 49 page

Device Markings

A suffix with the number 1, 2 or 3 will be added to each of the part numbers and printed on the package. The suffix num-

ber denotes the fixed oscillation frequency of the internal RC oscillator as shown.

Part No.

Device Marking

Internal RC Oscillator Frequency

HT48R01A

48R01A1

48R01A2

48R01A3

4MHz

8MHz

12MHz

Block Diagram

The following block diagram illustrates the main functional blocks.

Pin Assignment

HT48R01A

Rev. 1.10

August 4, 2008

O T P

P r o g r a m

M e m o r y

R A M D a t a

M e m o r y

W a t c h d o g

T i m e r

W a t c h d o g

T i m e r O s c i l l a t o r

8 - b i t

R I S C

M C U

C o r e

R e s e t

C i r c u i t

I n t e r r u p t

C o n t r o l l e r

R C / C r y s t a l

O s c i l l a t o r

L o w

V o l t a g e

R e s e t

B u z z e r

D r i v e r

T i m e r

O T P

P r o g r a m m i n g

C i r c u i t r y

S t a c k

I n t e r n a l

O s c i l l a t o r

I / O

P o r t s

P A 3 / I N T

P A 2 / T M R 0

P A 1 / B Z

P A 0 / B Z

V S S

P A 4

P A 5 / O S C 2

P A 6 / O S C 1

P A 7 / R E S

V D D

1 0

H T 4 8 R 0 1 A

1 0 M S O P - A

HT48R01A Datasheet(PDF) 2 Page - Holtek Semiconductor Inc

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