HT9480 datasheet(32/57 Pages) HOLTEK

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Address

Bit Definition

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

40H

ENA

A00

A01

A02

A03

A04

A05

A06

41H

A07

A08

A09

A10

A11

A12

A13

A14

42H

A15

A16

A17

FA2

FA1

FA0

43H

ENB

B00

B01

B02

B03

B04

B05

B06

44H

B07

B08

B09

B10

B11

B12

B13

B14

45H

B15

B16

B17

FB2

FB1

FB0

46H

ENC

C00

C01

C02

C03

C04

C05

C06

47H

C07

C08

C09

C10

C11

C12

C13

C14

48H

C15

C16

C17

FC2

FC1

FC0

49H

END

D00

D01

D02

D03

D04

D05

D06

4AH

D07

D08

D09

D10

D11

D12

D13

D14

4BH

D15

D16

D17

FD2

FD1

FD0

4CH

ENE

E00

E01

E02

E03

E04

E05

4DH

E07

E08

E09

E10

E11

E12

E13

E14

4EH

E15

E16

E17

FE2

FE1

FE0

4FH

ENF

F00

F01

F02

F03

F04

F05

50H

F07

F08

F09

F10

F11

F12

F13

F14

51H

F15

F16

F17

FF2

FF1

FF0

52H

SPF00

SPF01

SPF02

SPF03

SPF04

SPF05

SPF06

SPF07

53H

SPF08

SPF09

SPF10

SPF11

SPF12

SPF13

SPF14

SPF15

54H

SPF16

SPF17

SPF18

SPF19

SPF20

SPF21

SPF22

SPF23

Duplicate call suppression

The HT9480 provides a Duplicate Call Suppres-

sion with time-out facility, to identify duplicate

call reception. In display pager mode, duplicate

call indication is achieved only via the

µC inter-

face. A call is assumed to be duplicate if its

address and function bit setting is equal to the

latest received call, which initialized the call

address and function bit reference. The Dupli-

cate Call suppression time-out is selected by

programming SPF06, SPF07.

Configuration RAM organization

The decoder contains a 21-byte RAM to store 6

user addresses, 6 independently programmable

frame numbers and specially programmed

function bits (SPF00~SPF23) for the decoder

application configuration. The data memory is

mapped to the addresses 40H~54H of bank 27.

HT9480

23th Feb ’98

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