ZLP128ICE01ZEM Zilog, ZLP128ICE01ZEM Datasheet - Page 124

• Manufacturer Part Number: ZLP128ICE01ZEM
• Description: EMULATOR CRIMZON Z8 ZLP12840
• Manufacturer: Zilog

Specifications of ZLP128ICE01ZEM

• Interface Type: RS-232, Ethernet, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3829

Table 56. Flags Register (FLAGS)
PS024410-0108
Bit
Field
Reset
R/W
Address
Bit
Position Value Description
[7]
[6]
[5]
[4]
[3]
[2]
Flags Register
0
1
0
1
0
1
0
1
0
1
0
1
R/W
The Flags Register provides information on the current status of the Z8 CPU. It consists of
six bits of status information
C
X
7
Carry Flag (C)
Set when the result of an arithmetic operation generates a carry out of or a borrow into
the high-order bit (bit 7) of the result. Also used in rotate and shift instructions.
Flag Clear
Flag Set
Zero Flag (Z)
Set when the result of an arithmetic operation is 0.
Flag Clear
Flag Set
Sign Flag (S)
Stores the value of the most significant bit following an arithmetic, logical, rotate, or
shift instruction.
Flag Clear
Flag Set
Overflow Flag (O)
Set when the result of an arithmetic operation is greater than 127.
Flag Clear
Flag Set
Decimal Adjust Flag (D)
Used for binary-coded decimal (BCD) arithmetic.
Flag Clear
Flag Set
Half Carry Flag (H)
Set when a carry out of or borrow into bit 3 of an arithmetic operation occurs.
Flag Clear
Flag Set
R/W
X
6
Z
R/W
Bank Independent: FCh; Linear 0FCh
P R E L I M I N A R Y
S
X
5
(Table
R/W
56).
O
X
4
R/W
D
X
3
Z8 LXM CPU Programming Summary
R/W
H
X
2
Product Specification
ZLP12840 OTP MCU
R/W
F1
X
1
R/W
F2
X
0
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