SAF-XC858CA-16FFI5V 查看數據表（PDF） - Infineon Technologies

零件编号

产品描述 (功能)

比赛名单

SAF-XC858CA-16FFI5V

8-Bit Single-Chip Microcontroller

Infineon Technologies 

XC858CA

Functional Description

• Overwrite the contents of PAGE with the contents of STx, ignoring the value written

to the bit positions of PAGE

(this is done at the end of the interrupt routine to restore the previous page setting

before the interrupt occurred)

ST3

ST2

ST1

ST0

STNR

value update

from CPU

PAGE

Figure 11 Storage Elements for Paging

With this mechanism, a certain number of interrupt routines (or other routines) can

perform page changes without reading and storing the previously used page information.

The use of only write operations makes the system simpler and faster. Consequently,

this mechanism significantly improves the performance of short interrupt routines.

The XC858 supports local address extension for:

• Parallel Ports

• Analog-to-Digital Converter (ADC)

• System Control Registers

Data Sheet

26

V1.0, 2010-03

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