參數資料
型號： SAA55XX
廠商： NXP Semiconductors N.V.
英文描述： TV microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD)
中文描述： 與隱藏字幕（CC）和屏幕顯示（OSD電視微控制器）
文件頁數： 28/84頁
文件大小： 352K
代理商： SAA55XX
2000 Feb 23
28
Philips Semiconductors
Preliminary specification
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
SAA55xx
8.6
External (auxiliary) memory
The normal 80C51 external memory area has been
mappedinternallytothedevice,thismeansthattheMOVX
instruction accesses memory internal to the device.
8.6.1
A
UXILIARY
RAM
PAGE SELECTION
The Auxiliary RAM page pointer is used to select one of
the 256 pages within the Auxiliary RAM, not all pages are
allocated; refer to Fig.9 for further detail. A page consists
of 256 consecutive bytes.
Fig.9 Auxiliary RAM allocation.
(1) Display RAM for Closed Caption and Text is shared.
handbook, halfpage
GSA009
DYNAMICALLY
REDEFINABLE
CHARACTERS
DISPLAY RAM
FOR
CLOSED CAPTION
(1)
8000H
upper 32 kbytes
lower 32 kbytes
DISPLAY REGISTERS
87F0H
8BFFH
8C00H
FFFFH
8800H
87FFH
CLUT
871FH
8700H
ADDITIONAL
DATA RAM
84FFH
8460H
845FH
DISPLAY RAM
FOR
TEXT OSD
(1)
2000H
DATA RAM
23FFH
2400H
02FFH
0000H
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