saa5547ps NXP Semiconductors, saa5547ps Datasheet - Page 28

• Manufacturer Part Number: saa5547ps
• Description: Saa550x; Saa554x Tv Microcontrollers With Closed Captioning Cc And On-screen Display Osd
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.6
The normal 80C51 external memory area has been
mapped internally to the device, this means that the MOVX
instruction accesses memory internal to the device.
2000 Feb 23
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
(1) Display RAM for Closed Caption and Text is shared.
External (auxiliary) memory
handbook, halfpage
7FFFH
2400H
23FFH
2000H
02FFH
0000H
lower 32 kbytes
DISPLAY RAM
TEXT OSD
DATA RAM
Fig.9 Auxiliary RAM allocation.
FOR
(1)
28
8.6.1
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.
FFFFH
8C00H
8BFFH
8800H
87FFH
87F0H
871FH
8700H
84FFH
8460H
845FH
8000H
DISPLAY REGISTERS
CLOSED CAPTION
DYNAMICALLY
upper 32 kbytes
REDEFINABLE
CHARACTERS
DISPLAY RAM
A
ADDITIONAL
UXILIARY
DATA RAM
CLUT
FOR
RAM
GSA009
(1)
PAGE SELECTION
Preliminary specification
SAA55xx