參數(shù)資料
型號(hào): SAA5667HL/NNNN
廠商: NXP SEMICONDUCTORS
元件分類: 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
文件頁數(shù): 43/112頁
文件大?。?/td> 537K
代理商: SAA5667HL/NNNN
2004 Sep 03
36
Philips Semiconductors
Product specication
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA56xx
8.7
MOVX memory
The normal 80C51 external memory area has been
mapped internally to the device (see Fig.8). This means
that the MOVX instruction accesses memory internal to
the device.
8.7.1
MOVX SPACE PAGE SELECTION
The MOVX RAM page pointer is used to select one of the
256 pages within the MOVX address space, not all pages
are allocated, refer to Fig.9 for further detail. A page
consists of 256 consecutive bytes. XRAMP only works
with internal MOVX memory.
handbook, full pagewidth
GSA021
DYNAMICALLY
REDEFINABLE
CHARACTERS
DISPLAY RAM
FOR
CLOSED CAPTION (4)
address range 8460H to 84FFH
"Additional Internal Data RAM"
upper 32 kbytes
lower 32 kbytes
DISPLAY REGISTERS
8FFFH
9000H
FFFFH
8800H
87FFH
87E0H
CLUT
871FH
8700H
845FH
8000H
DISPLAY RAM
FOR
TEXT PAGES (1)
DATA RAM (2)
6FFFH
7000H
7FFFH
2000H
1FFFH
0800H
07FFH
0000H (3)
Fig.8 MOVX RAM allocation.
(1) Both SAA56xx 128 and 192 kbytes have 12 kbytes of Display memory.
(2) 0800H to 1FFFH are mapped into 6 kbytes of Bank 0 of external RAM.
An external RAM is required to be able to address this memory space (refer to Section 20 and Section 30.1).
(3) Both SAA56xx 128 and 192 kbytes have 2 kbytes of Data RAM.
(4) Display RAM for Closed Caption and Text is shared.
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