z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 254

• Manufacturer Part Number: z8f1621
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Condition Codes
PS019921-0308
Table 123. Additional Symbols
Assignment of a value is indicated by an arrow. For example,
indicates the source data is added to the destination data and the result is stored in the des-
tination location.
The C, Z, S and V Flags control the operation of the conditional jump (JP cc and JR cc)
instructions. Sixteen frequently useful functions of the Flag settings are encoded in a 4-bit
field called the condition code (cc), which forms Bits 7:4 of the conditional jump instruc-
tions. The condition codes are summarized in
be created using more than one assembly code mnemonic. The result of the Flag test oper-
ation decides if the conditional jump is executed.
Table 124. Condition Codes
Symbol
dst
src
@
SP
PC
FLAGS
RP
#
B
%
H
Binary
0000
0001
0010
dst
←
dst + src
Hex
Definition
Destination Operand
Source Operand
Indirect Address Prefix
Stack Pointer
Program Counter
Flags Register
Register Pointer
Immediate Operand Prefix
Binary Number Suffix
Hexadecimal Number Prefix
Hexadecimal Number Suffix
0
1
2
Mnemonic
Assembly
LE
LT
F
Less Than or Equal
Always False
Less Than
Definition
Table
124. Some binary condition codes can
Z8 Encore! XP
Product Specification
(Z OR (S XOR V)) = 1
eZ8
Flag Test Operation
™
(S XOR V) = 1
®
CPU Instruction Set
F64XX Series
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