HT9580 datasheet(41/63 Pages) HOLTEK

41 / 63 page

HT9580

April 28, 2000

Preliminary

Description of the special programmed

function bits (SPFn)

The following features can be selected by appro-

priate programming of the specially pro-

grammed function bits:

· SPF00~SPF01

Receiver (BS1) establishment time (for the

BS2~BS3 options, refer to SPF02~SPF05)

00: 7.81ms/512 53.33ms/1200/2400

01: 15.63ms/512 6.67ms/1200/2400

10: 31.25ms/512 13.33ms/1200/2400

11: 62.50ms/512 26.67ms/1200/2400

Note: The recommendatory setting is 11.

· SPF02~SPF03

RF dc level adjustment (BS2) enable time

00: 7.81ms/512 1.67ms/1200/2400

01: 11.71ms/512 6.67ms/1200/2400

10: 15.63ms/512 11.67ms/1200/2400

11: 19.53ms/512 13.33ms/1200/2400

· SPF04~SPF05

PLL (BS3) establishment time

00: 0ms/512 0ms/1200/2400

01: 31.25ms/512 26.67ms/1200/2400

10: 46.87ms/512 40.00ms/1200/2400

11: 62.50ms/512 53.33ms/1200/2400

· SPF06~SPF07

The duplicate call suppress time-out and

out-of-range hold-off time-out

00: 30s/512/1200 15s/2400

01: 60s/512/1200 30s/2400

10: 120s/512/1200 60s/2400

11: 240s/512/1200 120s/2400

· SPF08~SPF09

0x: Any two consecutive code-words or the

code-word directly following the address

code-word in error

10: Any single code-word in error

11: Any two consecutive code-words in error

· SPF10

1: 4-bit burst error correction for address and

message code-word

0: 2-bit random error correction for address

and message code-word

· SPF11

1: Out-of-range Hold-off period according to

SPF06 and SPF07

0: Out-of-range Hold-off period is 0 regardless

of SPF06 and SPF07

Baud rate selection bits(SPF12,SPF13,SPF14)

SPF12

SPF13

SPF14

Connected

Crystal (Hz)

Baud Rate

(bps)

32768

512

76.8k

512

76.8k

1200

76.8k

2400

153.6k

512

153.6k

1200

153.6k

2400

Note: The (SPF12, SPF13, SPF14) = (0, 1, 0)

when power on reset

· SPF15

Non-inverting or inverting data input selection

1: Inverting input selected for DI from RF cir-

cuit, referring to DI

0: Non-inverting input selected for DI from

RF circuit reserved, should be 0

· SPF16~SPF19

Message receiving mode selection depending

on the function code (bit20, bit21)

SPF16 Function Code (0, 0) is

a numeric message

Function Code (0, 0) is an

alpha-numeric message

SPF17 Function Code (0, 1) is

a numeric message

Function Code (0, 1) is an

alpha-numeric message

SPF18 Function Code (1, 0) is

a numeric message

Function Code (1, 0) is an

alpha-numeric message

SPF19 Function Code (1, 1) is

a numeric message

Function Code (1, 1) is

analpha-numeric message

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