ST92185B STMicroelectronics, ST92185B Datasheet - Page 124

• Manufacturer Part Number: ST92185B
• Description: 16k/24k/32k Rom Hcmos Mcu With On-screen-display
• Manufacturer: STMicroelectronics

ST92185B - ON SCREEN DISPLAY (OSD)
ON SCREEN DISPLAY (Cont’d)
NATIONAL CHARACTER SET REGISTER
(NCSR)
R245 - Read/Write
Register Page: 32
Reset Value: 0000 0000 (00h)
The register bit values are sampled and then acti-
vated only at each field start (on Vsync pulse).
Bit 7 = TSLE: Translucency/Half-Tone Output En-
able bit.
0: Translucency/Half-Tone signal disabled
1: Translucency/Half-Tone is enabled. Translu-
Note: Translucent display depends also on the
BE, TIO and MM bits, see
Bit 6 = Reserved.
Bit 5 = SWE: G0 Switch Enable Control Bit .
In case of a multiple G0 alphabet configuration
(NCM=1), this bit allows to switch from a first to a
second predefined G0 alphabet, using a single se-
rial attribute (1Bh). In case of a single G0 alphabet
configuration (NCM=0), the SWE bit will have no
effect.
If SWE is reset, the used G0 alphabet is pointed
through NC[1:0].
If SWE is set, the used G0 alphabet is pointed
through NC[3:2] and NC[1:0] toggled by 1Bh serial
attribute.
Bit 4 = NCM: National Character Mode control bit.
This bit reconfigures a part of the font set as defin-
ing:
124/178
TSLE
cency or Half-Tone realtime control signal is
routed in the TSLU/HT pin (depending on the
HTC bit in the FSCCR register).
7
0
SWE
NCM
NC3
Table
NC2
11.
NC1
NC0
0
– either a single G0 alphabet with up to 15 national
– or 3 different G0 alphabets.
If NCM is reset, a single G0 alphabet configuration
is activated and the 15 national sub-sets are se-
lected through the NC[3:0] bits.
If NCM is set, a triple G0 alphabet configuration is
activated, the selection of the G0 set used for the
display is done through either NC[3:2] or NC[1:0]
bits, depending upon the SWE control bit and the
serial attribute 1Bh values.
Bit 3:0 = NC[3:0]: National Character Set Selec-
tion .
If the NCM bit is reset, these bits define which na-
tional sub-set has to be used to complete the basic
currently used G0 alphabet set.
If the NCM is set, these bits define which G0 is
used.
Figure 81. National Characters Selection
15 NATIONAL
CHAR. SETS
sub-sets,
NC[3:0]
NS14
NS0
NS1
0
NCM
3 G0 SETS
NC[1:0]
1
0
G0-0
G0-1
G0-2
SWE
NC[1:0]
SERIAL ATTR. 1Bh
G0-0
G0-1
G0-2
1
TOGGLE
NC[3:2]
G0-0
G0-1
G0-2