PIC16F873-04I/SO Microchip Technology, PIC16F873-04I/SO Datasheet - Page 109

• Manufacturer Part Number: PIC16F873-04I/SO
• Description: IC MCU FLASH 4KX14 EE 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F873-04I/SO

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 4MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC16F
• No. Of I/o's: 22
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 4MHz
• No. Of Timers: 3
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 4 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI/USART
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL309-1073 - ADAPTER 28-SOIC TO 28-SOIC309-1024 - ADAPTER 28-SOIC TO 28-DIP309-1023 - ADAPTER 28-SOIC TO 28-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

1997 Microchip Technology Inc.
Example 6-4: RAM Initialization
Bank0_LP
;
; Next Bank (Bank1)
; (** ONLY REQUIRED IF DEVICE HAS A BANK1 **)
;
Bank1_LP
;
; Next Bank (Bank2)
; (** ONLY REQUIRED IF DEVICE HAS A BANK2 **)
;
Bank2_LP
;
; Next Bank (Bank3)
; (** ONLY REQUIRED IF DEVICE HAS A BANK3 **)
;
Bank3_LP
:
CLRF
MOVLW
MOVWF
CLRF
INCF
BTFSS
GOTO
MOVLW
MOVWF
CLRF
INCF
BTFSS
GOTO
BSF
MOVLW
MOVWF
CLRF
INCF
BTFSS
GOTO
MOVLW
MOVWF
CLRF
INCF
BTFSS
GOTO
Section 6. Memory Organization
STATUS
0x20
FSR
INDF0
FSR
FSR, 7
Bank0_LP
0xA0
FSR
INDF0
FSR
STATUS, C
Bank1_LP
STATUS, IRP
0x20
FSR
INDF0
FSR
FSR, 7
Bank2_LP
0xA0
FSR
INDF0
FSR
STATUS, C
Bank3_LP
; Clear STATUS register (Bank0)
; 1st address (in bank) of GPR area
; Move it to Indirect address register
; Clear GPR at address pointed to by FSR
; Next GPR (RAM) address
; End of current bank ? (FSR = 80h, C = 0)
; NO, clear next location
; 1st address (in bank) of GPR area
; Move it to Indirect address register
; Clear GPR at address pointed to by FSR
; Next GPR (RAM) address
; End of current bank? (FSR = 00h, C = 1)
; NO, clear next location
; Select Bank2 and Bank3
;
; 1st address (in bank) of GPR area
; Move it to Indirect address register
; Clear GPR at address pointed to by FSR
; Next GPR (RAM) address
; End of current bank? (FSR = 80h, C = 0)
; NO, clear next location
; 1st address (in bank) of GPR area
; Move it to Indirect address register
; Clear GPR at address pointed to by FSR
; Next GPR (RAM) address
; End of current bank? (FSR = 00h, C = 1)
; NO, clear next location
; YES, All GPRs (RAM) is cleared
for Indirect addressing
DS31006A-page 6-15
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