參數(shù)資料
型號(hào)： SAF-C868-1SR
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 8-BIT, 40 MHz, MICROCONTROLLER, PDSO38
封裝： PLASTIC, TSSOP-38
文件頁數(shù)： 5/70頁
文件大?。?/td> 1067K
代理商： SAF-C868-1SR
C868
Data Sheet
13
V 0.2, 2002-01
CPU
The C868 is efficient both as a controller and as an arithmetic processor. It has extensive
facilities for binary and BCD arithmetic and excels in its bit-handling capabilities. Efficient
use of program memory results from an instruction set consisting of 44% one-byte, 41%
two-byte, and 15% three-byte instructions. With a 10.67 MHz external crystal (giving a
40MHz CPU clock), 58% of the instructions execute in 300 ns.
PSW
Program Status Word Register
[Reset value: 00H]
D7H
D6H
D5H
D4H
D3H
D2H
D1H
D0H
CY
AC
F0
RS1
RS0
OV
F1
P
rwh
rw
rwh
rw
rwh
Field
Bits
Typ Description
P
0rwh Parity Flag
Set/cleared by hardware after each instruction to
indicate an odd/even number of "one" bits in the
accumulator, i.e. even parity.
F1
1rw
General Purpose Flag
OV
2rwh Overflow Flag
Used by arithmetic instructions.
RS0
RS1
3
4
rw
Register Bank select control bits
These bits are used to select one of the four register
banks.
F0
5rw
General Purpose Flag
AC
6rwh Auxiliary Carry Flag
Used by instructions which execute BCD operations.
CY
7rwh Carry Flag
Used by arithmetic instructions.
Table 2 :
RS1 RS0 Function
0
Bank 0 selected, data address 00H-07H
0
1
Bank 1 selected, data address 08H-0FH
1
0
Bank 2 selected, data address 10H-17H
1
Bank 3 selected, data address 18H-1FH
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