STV5342 데이터 시트보기 (PDF) - STMicroelectronics
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STV5342 Datasheet PDF : 20 Pages
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STV5342
REGISTER FUNCTIONS
Register Function
Bit(s)
Description
R9 to R11A Active row address (R9), active column address (R10).
Address Data contained in R11A read (written) from (to) memory by microprocessor via I2C.
09H to 0BH*
R11B
Address
0BH*
Status
VCS Signal
Quality (D0)
60Hz (D7)
Good VCS quality signal detected (D0 = 1) or disturbed (D0 = 0)
VCS received with 60Hz frequency (D7 = 1) or 50Hz (D7 = 0).
Only valid when VCS is good (D0 = 1)
* Reading of R11A or R11B is determined by register 0, bit D0. Nevertheless, write operation is always performed on R11A register.
Table 3 : Register R3
START
COLUMN
0
1
2
3
4
5
6
PRD4
Do care magazine
Do care page tens
Do care page units
Do care hours tens
Do care hours units
Do care minutes tens
Do care minutes units
PRD3
HOLD
PT3
PU3
X
HU3
X
MU3
PRD2
MAG2
PT2
PU2
X
HU2
MT2
MU2
PRD1
MAG1
PT1
PU1
HT1
HU1
MT1
MU1
PRD0
MAG0
PT0
PU0
HT0
HU0
MT0
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 I2C bus is automatic.
CHARACTER SETS
The complete character set with 8-bit decoding is
given in Table 4.
Characters in columns 0 and 1 are normally dis-
played as blanks. Black dots represent the charac-
ter shape whereas white dots represent 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.
15/20
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