參數(shù)資料
型號： P87C770AAR
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
中文描述： 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP52
文件頁數(shù)： 57/80頁
文件大小： 266K
代理商： P87C770AAR
1999 Jun 11
57
Philips Semiconductors
Product specification
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
P8xCx70 family
Table 93
Status Register (address 87F8H); write only
Table 94
Description of SR bits
18.9.10
HSYNC D
ELAY
R
EGISTER
(HSDR)
Table 95
HSYNC Delay Register (address 87FCH)
Table 96
Description of HSDR bits
7
6
5
4
3
2
1
0
H/V
SCON
SCRL
BIT
SYMBOL
H/V
DESCRIPTION
7
6
This bit is not used and causes no action.
Busy signal switch horizontal/vertical.
If H/V = 0, horizontal blank area selected.
If H/V = 1, vertical blank area selected.
Scroll area enabled.
If SCON = 1, then the scroll area is enabled.
See Section 18.5.1.2.
Start scroll.
If SCRL = 1, this bit indicates that the scroll function is in progress. When
this bit is set, the automatic scroll function is started. It is automatically cleared on
completion. If forced to a logic 0, the scroll function will be terminated as if all lines were
scrolled. Subsequent logic 0 writes will cause the scroll row to increment by one.
These 4 bits are not used and cause no action.
5
SCON
4
SCRL
3
2
1
0
7
6
5
4
3
2
1
0
HSD6
HSD5
HSD4
HSD3
HSD2
HSD1
HSD0
BIT
SYMBOL
HSD6
HSD5
HSD4
HSD3
HSD2
HSD1
HSD0
DESCRIPTION
7
6
5
4
3
2
1
0
reserved
HSYNC delay.
These 7 bits allow the position of the HSYNC pulse to be changed in
increments of full width characters. A delay of 0 to 63 full width characters can be
selected.
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