ZLF645E0Q2064G Zilog, ZLF645E0Q2064G Datasheet - Page 164

• Manufacturer Part Number: ZLF645E0Q2064G
• Description: IC MCU 64K FLASH 1K RAM 20-QFN
• Manufacturer: Zilog
• Series: Crimzon™ ZLFr

Specifications of ZLF645E0Q2064G

• Core Processor: Z8 LXMC
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, WDT
• Number Of I /o: 16
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.9 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Oscillator Type: -
• Other names: 269-4723

PS026407-0408
Table 78. 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 78
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
156