PIC16F628A-I/P Microchip Technology Inc., PIC16F628A-I/P Datasheet - Page 115

• Manufacturer Part Number: PIC16F628A-I/P
• Description: 18 PIN, 3.5 KB FLASH, 224 RAM, 16 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F628A-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 16
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 224 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

DECFSZ
 2003 Microchip Technology Inc.
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Decrement f, Skip if 0
[ label ] DECFSZ f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) - 1 → (dest);
0
None
00
The contents of register 'f' are
decremented. If 'd' is 0 the result
is placed in the W register. If 'd'
is 1 the result is placed back in
register 'f'.
If the result is 0, the next
instruction, which is already
fetched, is discarded. A NOP is
executed instead making it a
two-cycle instruction.
1
1(2)
HERE
CONTINUE •
Before Instruction
After Instruction
PC
REG1
if REG1 = 0,
PC
if REG1 ≠ 0,
PC
1011
DECFSZ
= address CONTINUE
GOTO
•
•
=
= REG1 - 1
= address HERE+1
address
dfff
skip if result =
REG1, 1
LOOP
HERE
ffff
Preliminary
GOTO
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Unconditional Branch
[ label ]
0 ≤ k ≤ 2047
k → PC<10:0>
PCLATH<4:3> → PC<12:11>
None
10
GOTO is an unconditional
branch. The eleven bit
immediate value is loaded into
PC bits <10:0>. The upper bits
of PC are loaded from
PCLATH<4:3>. GOTO is a two-
cycle instruction.
1
2
GOTO THERE
After Instruction
PC = Address THERE
PIC16F62X
1kkk
GOTO k
DS40300C-page 113
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