PIC16F628-04I/SO Microchip Technology, PIC16F628-04I/SO Datasheet - Page 47
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PIC16F628-04I/SO
Manufacturer Part Number
PIC16F628-04I/SO
Description
IC MCU FLASH 2KX14 COMP 18SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheet
1.PIC16F627-04P.pdf
(170 pages)
Specifications of PIC16F628-04I/SO
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
18-SOIC (7.5mm Width)
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Eeprom Size
128 x 8
Ram Size
224 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
224 B
Interface Type
SCI/USART
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
16
Number Of Timers
3
Operating Supply Voltage
3 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
Data Rom Size
128 B
Height
2.31 mm
Length
11.53 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
3 V
Width
7.49 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILAC164010 - MODULE SKT PROMATEII DIP/SOIC
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
PIC16F628-04I/SOR
PIC16F628-04I/SOR
PIC16F628-04I/SOR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC16F628-04I/SO
Manufacturer:
MIC
Quantity:
20 000
6.3.1
The prescaler assignment is fully under software
control (i.e., it can be changed “on the fly” during
program execution). Use the instruction sequences,
shown in Example 6-1, when changing the prescaler
assignment from Timer0 to WDT, to avoid an
unintended device RESET.
EXAMPLE 6-1:
TABLE 6-1:
2003 Microchip Technology Inc.
01h
0Bh/8Bh/
10Bh/18Bh
81h, 181h
85h
Legend:
Note 1: Shaded bits are not used by TMR0 module.
Address
BCF
CLRWDT
CLRF
BSF
MOVLW
MOVWF
CLRWDT
MOVLW
MOVWF
BCF
2: Option is referred by OPTION_REG in MPLAB.
— = Unimplemented locations, read as ‘0’, u = unchanged, x = unknown
SWITCHING PRESCALER
ASSIGNMENT
TMR0
INTCON
OPTION
TRISA
STATUS, RP0
TMR0
STATUS, RP0
'00101111’b
OPTION_REG
'00101xxx’b
OPTION_REG
STATUS, RP0
Name
REGISTERS ASSOCIATED WITH TIMER0
(2)
CHANGING PRESCALER
(TIMER0→WDT)
Timer0 module register
TRISA7
RBPU
Bit 7
GIE
;Skip if already in
;Bank 0
;Clear WDT
;Clear TMR0 & Prescaler
;Bank 1
;These 3 lines
;(5, 6, 7)
;are required only
;if desired PS<2:0>
;are
;000 or 001
;Set Postscaler to
;desired WDT rate
;Return to Bank 0
INTEDG
TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 1111 1111 1111 1111
Bit 6
PEIE
T0CS
Bit 5
T0IE
Preliminary
T0SE
Bit 4
INTE
Bit 3
RBIE
PSA
To change prescaler from the WDT to the TMR0
module use the sequence shown in Example 6-2. This
precaution must be taken even if the WDT is disabled.
EXAMPLE 6-2:
CLRWDT
BSF
MOVLW
MOVWF
BCF
Bit 2
T0IF
PS2
STATUS, RP0
b'xxxx0xxx' ;Select TMR0, new
OPTION_REG
STATUS, RP0
Bit 1
INTF
PS1
CHANGING PRESCALER
(WDT→TIMER0)
Bit 0
RBIF
PS0
PIC16F62X
;Clear WDT and
;prescaler
;prescale value and
;clock source
xxxx xxxx uuuu uuuu
0000 000x 0000 000u
1111 1111 1111 1111
Value on
POR
DS40300C-page 45
All Other
Value on
RESETS