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參數(shù)資料
| 型號(hào)： | SAB80C517A-N18-T3 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 18 MHz, MICROCONTROLLER, PQCC84 |
| 封裝： | PLASTIC, LCC-84 |
| 文件頁(yè)數(shù)： | 119/137頁(yè) |
| 文件大?。?/td> | 2089K |
| 代理商： | SAB80C517A-N18-T3 |
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Device Specification
Semiconductor Group
7-20
Special Function Register XPAGE
The reset value of XPAGE is 00H.
XPAGE can be set and read by software.
The register XPAGE provides the upper address byte for accesses to XRAM with MOVX @Ri
instructions. If the address formed from XPAGE and Ri is less than the XRAM address range,
then an external access is performed. For the SAB 80C517A the contents of XPAGE must be
greater or equal than F8H in order to use the XRAM. Of course, the XRAM must be enabled if
it shall be used with MOVX @Ri instructions.
Thus, the register XPAGE is used for addressing of the XRAM; additionally its contents are
used for generating the internal XRAM select. If the contents of XPAGE is less than the XRAM
address range then an external bus access is performed where the upper address byte is
provided by P2 and not by XPAGE!
Therefore, the software has to distinguish two cases, if the MOVX @Ri instructions with paging
shall be used:
a) Access to XRAM:
The upper address byte must be written to XPAGE
or P2; both writes selects the XRAM address range.
b) Access to external memory: The upper address byte must be written to P2; XPAGE
will be loaded with the same address in order to deselect
the XRAM.
Addr. 91H
XPAGE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAB83C517A-N18-T4 | 8-BIT, 18 MHz, MICROCONTROLLER, PQCC84 |
| SAB80C517A-S18-T3 | 8-BIT, 18 MHz, MICROCONTROLLER, PQFP100 |
| SAB83C517A-5S18-T3 | 8-BIT, MROM, 18 MHz, MICROCONTROLLER, PQFP100 |
| SAB83C517A-5S18-T4 | 8-BIT, MROM, 18 MHz, MICROCONTROLLER, PQFP100 |
| SAB80C517A-S18-T3 | 8-BIT, 18 MHz, MICROCONTROLLER, PQFP100 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAB80C517-M | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
| SAB80C517-M16 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
| SAB80C517-M-T40/85 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
| SAB80C517-N | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
| SAB80C517-N16 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
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