參數(shù)資料
型號: SAA5500PS/NNNN
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP52
封裝: 0.600 INCH, PLASTIC, SDIP-52
文件頁數(shù): 22/80頁
文件大小: 340K
代理商: SAA5500PS/NNNN
1999 Oct 27
29
Philips Semiconductors
Preliminary specication
Standard TV microcontrollers with
On-Screen Display (OSD)
SAA55xx
8.6
External (auxiliary) memory
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.
8.6.1
AUXILIARY 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.10 for further detail. A page consists
of 256 consecutive bytes.
Fig.9 Auxiliary RAM allocation.
(1) Amount of Data RAM depends on the device.
(2) Amount of Display RAM depends on the device.
handbook, halfpage
GSA031
CLUT
upper 32 kbytes
lower 32 kbytes
FFFFH
8C00H
DISPLAY REGISTERS
87FFH
87F0H
871FH
8700H
DISPLAY RAM
FOR
TEXT PAGES (2)
DATA RAM (1)
47FFH
4800H
7FFFH
2000H
1FFFH
500H
4FFH
0000H
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