PIC16F877T-20I/L Microchip Technology, PIC16F877T-20I/L Datasheet - Page 543

• Manufacturer Part Number: PIC16F877T-20I/L
• Description: IC MCU FLASH 8KX14 EE 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877T-20I/L

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• For Use With: DVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1997 Microchip Technology Inc.
DECF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example 1
Example 2
Example 3
Q1
Decode
Q2
register 'f'
[ label ] DECF f,d
0
d
(f) - 1
Z
Decrement register 'f'. If 'd' is 0 the result is stored in the W register. If 'd' is 1 the
result is stored back in register 'f'
1
1
Before Instruction
After Instruction
Before Instruction
After Instruction
Before Instruction
After Instruction
Read
DECF
DECF
DECF
00
f
[0,1]
Section 29. Instruction Set
127
destination
CNT = 0x01
Z
CNT = 0x00
Z
FSR = 0xC2
Contents of Address (FSR) = 0x01
Z
FSR = 0xC2
Contents of Address (FSR) = 0x00
Z
CNT = 0x10
W
Z
CNT = 0x10
W
Z
Decrement f
INDF, 1
0011
Q3
CNT, 1
CNT, 0
Process
= 0
= 1
= 0
= 1
= x
= 0
= 0x0F
= 0
data
dfff
Q4
destination
Write to
ffff
.
DS31029A-page 29-21
29