PIC16F872-E/SS Microchip Technology, PIC16F872-E/SS Datasheet - Page 108

• Manufacturer Part Number: PIC16F872-E/SS
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-E/SS

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SSOP
• Package: 28SSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
6.4
DS31006A-page 6-14
Initialization
Example 6-3
shows some code to do initialization (clearing) of General Purpose RAM.
Example 6-3: Bank Switching
CLRF
:
BSF
:
BCF
:
MOVLW
XORWF
:
BCF
:
BCF
shows how the bank switching occurs for Direct addressing, while
STATUS
STATUS, RP0
STATUS, RP0
0x60
STATUS, F
STATUS, RP0
STATUS, RP1
; Clear STATUS register (Bank0)
;
; Bank1
;
; Bank0
;
; Set RP0 and RP1 in STATUS register, other
;
;
; Bank2
;
; Bank0
bits unchanged (Bank3)
1997 Microchip Technology Inc.
Example 6-4