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C167CS Datasheet(PDF) 66 Page - Infineon Technologies AG

Part # C167CS
Description  16-Bit Single-Chip Microcontroller
PDF  517 Pages
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

C167CS Datasheet(HTML) 66 Page - Infineon Technologies AG

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C167CS
Derivatives
The Central Processing Unit (CPU)
User’s Manual
4-16
V2.0, 2000-07
The Processor Status Word PSW
This bit-addressable register reflects the current state of the microcontroller. Two groups
of bits represent the current ALU status, and the current CPU interrupt status. A separate
bit (USR0) within register PSW is provided as a general purpose user flag.
ALU Status (N, C, V, Z, E, MULIP)
The condition flags (N, C, V, Z, E) within the PSW indicate the ALU status due to the last
recently performed ALU operation. They are set by most of the instructions due to
specific rules, which depend on the ALU or data movement operation performed by an
instruction.
PSW
Program Status Word
SFR (FF10H/88H)
Reset Value: 0000H
15
14
13
12
11
10
9876
543210
ILVL
IEN HLD
EN
--
-
USR0 MUL
IP
EZ
V
C
N
rwh
rw
rw
-
-
-
rw
rwh
rwh
rwh
rwh
rwh
rwh
Bit
Function
N
Negative Result
Set, when the result of an ALU operation is negative.
C
Carry Flag
Set, when the result of an ALU operation produces a carry bit.
V
Overflow Result
Set, when the result of an ALU operation produces an overflow.
ZZero Flag
Set, when the result of an ALU operation is zero.
E
End of Table Flag
Set, when the source operand of an instruction is 8000H or 80H.
MULIP
Multiplication/Division In Progress
0:
There is no multiplication/division in progress.
1:
A multiplication/division has been interrupted.
USR0
User General Purpose Flag
May be used by the application software.
HLDEN, ILVL,
IEN
Interrupt and EBC Control Fields
Define the response to interrupt requests and enable external bus
arbitration. (Described in Chapter 5)



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