參數(shù)資料
型號(hào)： SDA 5251
廠商： SIEMENS AG
英文描述： TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器（含ROM 型 ）)
中文描述： TVTEXT 8位微控制器（ROM的版本）（電視視頻的8位微控制器（含光盤型））
文件頁數(shù)： 49/143頁
文件大?。?/td> 1050K
代理商： SDA 5251
SDA 525x
Semiconductor Group
49
1998-04-08
6.3.2
The processor memory is organized into two address spaces. The memory spaces are:
– Program memory address space
– 256 byte plus 128-byte internal data memory address space
– Extended internal data memory (XRAM) for storing teletext and display data.
A 16-bit program counter and a dedicated banking logic provide the processor with its
512-Kbyte addressing capabilities (for ROM-less versions, up to 19 address lines are
available). The program counter allows the user to execute calls and branches to any
location within the program memory space. There are no instructions that permit
program execution to move from the program memory space to any of the data memory
space.
Memory Organization
6.3.2.1
Certain locations in program memory are reserved for specific programs. Locations 0000
through 0002 are reserved for the initialization program. Following reset, the CPU
always begins execution at location 0000. Locations 0003 through 0051 are reserved for
the seven interrupt-request service programs as indicated in
Table 7
.
Program Memory
Depending on the selected type, the user can access a part of the internal/external ROM
for the application software. Please note that another part of the Program Memory is
reserved for the TTX firmware.
Table 7
Source
External Interrupt 0
Timer 0 Overflow
External Interrupt 1
Timer 1 Overflow
Serial Interface
Teletext Sync Signals
Analog Digital Converter
Address
03
11
19
27
35
43
51
(03
H
)
(0B
H
)
(13
H
)
(1B
H
)
(23
H
)
(2B
H
)
(33
H
)
Table 8
Type
SDA 5250
SDA 5251
SDA 5252
SDA 5254
SDA 5255
Available User ROM Space
480
Kbyte
8
Kbyte
16
Kbyte
16
Kbyte
24
Kbyte
externally
internally
internally
internally
internally
相關(guān)PDF資料
PDF描述
SDA 5252 TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器（含ROM 型 ）)
SDA 5254 TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器（含ROM 型 ）)
SDA5254M ICs for Consumer Electronics
SDA525X ICs for Consumer Electronics
SDA 5250 TVTEXT 8-Bit Microcontroller(ROMLess-Versions )(TV視頻的8位微控制器（無ROM 型 ）)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SDA5251-2 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5251M 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5251M-2 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5252 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5252-2 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
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