ST92195D datasheet(161/249 Pages) STMICROELECTRONICS

No. de pieza	ST92195D

Descripción Electrónicos	48-96 Kbyte ROM HCMOS MCU WITH ON-SCREEN DISPLAY AND TELETEXT DATA SLICER

PDF	249 Pages

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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ST92195C/D - TELETEXT SLICER AND ACQUISITION UNIT

TELETEXT SLICER AND ACQUISITION UNIT (Cont’d)

Hamming 24/18 Correction

On writing, these 24 bits are the data to be Ham-

ming 24/18 checked, where “P” are Hamming bits

and “D” are Data bits.

ACQHD2R

ACQHD1R

ACQHD0R

On reading, the bits are redefined as follows:

ACQHD2R

ACQHD1R

ACQHD0R

Bit 23 = ERR:

Hamming Error.

This bit is set by hardware and cleared by soft-

ware.

0: The 24-bit word is correctly Hamming decoded

(no error or a recoverable error).

1: The result of the Hamming decoding is wrong

(unrecoverable error).

Note: The D[18:1] bits are cleared by hardware

when ERR=1.

Bits 22:16= D[18:12]:

Data

Bits 15:13 = Reserved

Bits 12:8 = D[11:7]:

Mode

Bits 7:6 = Reserved

Bits 5:0 = D[6:1]:

Address

D18

D17

D16

D15

D14

D13

D12

D11

D10

ERR

D18

D17

D16

D15

D14

D13

D12

D11

D10

ST92195D Datasheet(PDF) 161 Page - STMicroelectronics

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