REGISTER FUNCTIONS (continued)

Register

Function

Bit(s)

Description

R8 to R11A

Address

08H to 0BH*

Active chapter address (R8), active row address (R9), active column address (R10).

Data contained in R11A read (written) from (to) memory by microprocessor via I

R11B

Address

0BH*

Status

VCS Signal Quality

(D0)

Good VCS quality signal detected (D0 = 1) or disturbed

(D0 = 0)

60Hz (D7)

VCS received with 60Hz frequency (D7 = 1) or 50Hz (D7

= 0). Only valid when VCS is good (D0 = 1)

R12

Address

0CH

Page request

address

A0, A1 (D3, D4)

A0, A1 addresses of displayed page to refresh when using

refresh on display function

EROD (D5)

Enable refresh on displayed page function when = 1

normal acquisition storage if EROD = 0

* Reading of R11A or R11B is determined by register 0, bit D0. Nevertheless, write operation is always performed on R11A register.

START

COLUMN

PRD4

PRD3

PRD2

PRD1

PRD0

0

Do care magazine

HOLD

MAG2

MAG1

MAG0

1

Do care page tens

PT3

PT2

PT1

PT0

2

Do care page units

PU3

PU2

PU1

PU0

3

Do care hours tens

X

X

HT1

HT0

4

Do care hours units

HU3

HU2

HU1

HU0

5

Do care minutes tens

X

MT2

MT1

MT0

6

Do care minutes units

MU3

MU2

MU1

MU0

The abbreviations have the same significance as in Table 1 with the exception of the ”DO CARE” entries. It is only

when this bit is ”1” that the corresponding digit is taken into consideration on page request. For example, a page

defined as ”normal” or one defined as ”timed” may be selected.

If ”HOLD” is low the page is held. The addressing of successive bytes via the I

Table 3 : Register R3

CHARACTER SETS

The complete character set with 8-bit decoding is

given in Tables 4a, 4b and 4c.

Characters in columns 0 and 1 are normally dis-

played as blanks. Black dots represent the charac-

ter shape whereas white dots rep resent the

background.

Each character can be identified by a pair of corre-

sponding row and column integers : for example

the character ”3” may be indicated by 3/3.

A rectangle may be represented as follows :

The characters 8/6, 8/7, 9/5, 9/7 are used as spe-

cial characters, always in conjunction with 8/5.

The 13 national characters are placed in columns

with bit 8 = 0.

STV5345 - STV5345/H - STV5345/T

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