ZLF645E0H2864G00TR Maxim Integrated, ZLF645E0H2864G00TR Datasheet - Page 169

• Manufacturer Part Number: ZLF645E0H2864G00TR
• Description: 8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
• Manufacturer: Maxim Integrated

Specifications of ZLF645E0H2864G00TR

• Core: Z8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 1 KB
• Operating Supply Voltage: 2 V to 3.6 V
• Package / Case: SSOP-28
• Mounting Style: SMD/SMT
• Interface Type: UART
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Number Of Programmable I/os: 5
• Number Of Timers: 2 x 8 bit, 1 x 16 bit
• Processor Series: ZLF645
• Program Memory Type: Flash

19-4572; Rev 0; 4/09
Table 77. Condition Codes
Bit Position
[3]
[2]
[1]
[0]
Binary
0000
0001
0010
0011
0100
0101
0110
0110
Condition Codes
Hex
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).
binary condition codes can be created using more than one assembly code mnemonic. The
result of the flag test operation determines if the conditional jump executes.
0
1
2
3
4
5
6
6
Value
0
1
0
1
0
1
0
1
Assembly
Mnemonic
F
LT
LE
ULE
OV
Ml
Z
EQ
Description
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
User Flag 1 (F1)
Available to software for use as a general-purpose bit.
Bit Clear
Bit Set
User Flag 2 (F2)
Available to software for use as a general-purpose bit.
Bit Clear
Bit Set
Definition
Always False
Less than
Less than or Equal
Unsigned Less than or Equal
Overflow
Minus
Zero
Equal
Table 77
summarizes the condition codes. Some
ZLF645 Series Flash MCUs
Flag Test Operation
–
(S XOR V) = 1
(Z OR (S XOR V)) = 1
(C OR Z) = 1
V = 1
S = 1
Z = 1
Z = 1
Product Specification
Condition Codes
161