PIC16F877-04E/PQ Microchip Technology, PIC16F877-04E/PQ Datasheet - Page 186
![IC MCU FLASH 8KX14 EE 44-MQFP](/photos/6/59/65984/150-44-pqfp_sml.jpg)
PIC16F877-04E/PQ
Manufacturer Part Number
PIC16F877-04E/PQ
Description
IC MCU FLASH 8KX14 EE 44-MQFP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16C770-ISO.pdf
(8 pages)
4.PIC16F873-04SO.pdf
(218 pages)
5.PIC16F873-04SO.pdf
(5 pages)
6.PIC16F873-04SO.pdf
(5 pages)
Specifications of PIC16F877-04E/PQ
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
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 ~ 125°C
Package / Case
44-MQFP, 44-PQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PIC16F87704E/PQ
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F877-04E/PQ
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16C770-ISO PDF datasheet #3
- PIC16F873-04SO PDF datasheet #4
- PIC16F873-04SO PDF datasheet #5
- PIC16F873-04SO PDF datasheet #6
- Current page: 186 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
DS31012A-page 12-6
Example 12-2
in
Example 12-2:
Writing a 16-bit value to the 16-bit TMR1 register is straight forward. First the TMR1L register is
cleared to ensure that there are many Timer1 clock/oscillator cycles before there is a rollover into
the TMR1H register. The TMR1H register is then loaded, and finally the TMR1L register is loaded.
Example 12-3
Example 12-3:
; All interrupts are disabled
;
; TMR1L may have rolled over between the read of the high and low bytes.
; Reading the high and low bytes now will read a good value.
;
; Re-enable the Interrupt (if required)
CONTINUE
; All interrupts are disabled
; Re-enable the Interrupt (if required)
CONTINUE
Example
MOVF
MOVWF
MOVF
MOVWF
MOVF
SUBWF
BTFSC
GOTO
MOVF
MOVWF
MOVF
MOVWF
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
12-1. This is useful if the timer cannot be stopped.
shows a routine to read the 16-bit timer value with experiencing the issues shown
shows this:
TMR1H, W
TMPH
TMR1L, W
TMPL
TMR1H, W
TMPH,
STATUS,Z
CONTINUE
TMR1H, W
TMPH
TMR1L, W
TMPL
TMR1L
HI_BYTE
TMR1H, F
LO_BYTE
TMR1H, F
Reading a 16-bit Free-Running Timer
Writing a 16-bit Free Running Timer
W
; Read high byte
;
; Read low byte
;
; Read high byte
; Sub 1st read with 2nd read
; Is result = 0
; Good 16-bit read
; Read high byte
;
; Read low byte
;
; Continue with your code
; Clear Low byte, Ensures no
;
; Value to load into TMR1H
; Write High byte
; Value to load into TMR1L
; Write Low byte
; Continue with your code
rollover into TMR1H
1997 Microchip Technology Inc.
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