參數(shù)資料
型號(hào)： SAA5667HL/NNNN
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-407-1, LQFP-100
文件頁(yè)數(shù)： 87/112頁(yè)
文件大小： 537K
代理商： SAA5667HL/NNNN
2004 Sep 03
76
Philips Semiconductors
Product specication
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA56xx
23.4.15 DYNAMICALLY REDEFINABLE CHARACTERS (DRCS)
A number of DRCs are available (see Fig.31). These are
mapped onto the normal character codes, and replace the
predefined Character ROM value.
By default there are 32 DRCs occupying the character
codes 80H to 8FH. The SAA56xx family of devices offers
32 additional DRCs over the SAA55xx by setting TXT26.
The first 16 of them occupy the character codes A0 to AF,
the second 16 occupy the character codes C0 to CF.
The remapping of the standard OSD to the DRCs is
activated when the TXT20.DRCS ENABLE bit for single
page mode or for Page A in double window mode, and
TXT23.DRCS B ENABLE for Page B in double window
mode.
Each character is stored in a matrix of 12
× 16 × 1
(V
× H × planes), this allows for all possible character
matrices to be defined within a single location.
handbook, full pagewidth
GSA063
CHARACTER 46
character 0
address (HEX)
AEH
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
CHARACTER 48
C0H
CHARACTER 49
C1H
CHARACTER 47
AFH
CHARACTER 62
CEH
CHARACTER 63
12 bits
CFH
CHARACTER 30
9EH
CHARACTER 32
A0H
CHARACTER 33
A1H
8BC0
8BDF
CHARACTER 31
9FH
8BE0
additional DRCs
for TXT26.7 = 1
8BFF
CHARACTER 0
address (HEX)
character code
80H
CHARACTER 1
81H
CHARACTER 2
82H
8800
881F
8820
883F
8840
885F
Fig.31 Organisation of DRC RAM.
The SAA56xx family of devices offers 32 additional DRCs over the SAA55xx by setting TXT26.7. The first 16 of them occupy character codes A0 to AF,
the second 16 occupy character codes C0 to CF.
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