PIC16F870-E/SO Microchip Technology, PIC16F870-E/SO Datasheet - Page 487
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PIC16F870-E/SO
Manufacturer Part Number
PIC16F870-E/SO
Description
28 PIN, 3.5KB ENH FLASH, 128 RAM, 22 I/O,
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F870-ISO.pdf
(172 pages)
4.PIC16F870-ISO.pdf
(6 pages)
Specifications of PIC16F870-E/SO
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
UART/USART
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-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
I3-DB16F871 - BOARD DAUGHTER ICEPIC3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F870-ISO PDF datasheet #3
- PIC16F870-ISO PDF datasheet #4
- Current page: 487 of 688
- Download datasheet (3Mb)
Section 26. Watchdog Timer and Sleep Mode
26.2
1997 Microchip Technology Inc.
Control Register
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2:0
The OPTION_REG register is a readable and writable register which contains various control bits
to configure the TMR0 prescaler/WDT postscaler, the External INT Interrupt, TMR0, and the
weak pull-ups on PORTB.
Register 26-1: OPTION_REG Register
bit 7
RBPU
1 = Weak pull-ups are disabled
0 = Weak pull-ups are enabled by individual port latch values
INTEDG: Interrupt Edge Select bit
1 = Interrupt on rising edge of INT pin
0 = Interrupt on falling edge of INT pin
T0CS: TMR0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
T0SE: TMR0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to the WDT
0 = Prescaler is assigned to the Timer0 module
PS2:PS0: TMR0 Prescaler/WDT Postscaler Rate Select bits
Bit Value
Legend
R = Readable bit
U = Unimplemented bit, read as ‘0’
RBPU
R/W-1
Note:
Note 1: Some devices call this bit GPPU. Devices that have the RBPU bit, have the weak
000
001
010
011
100
101
110
111
(1)
(1)
: Weak Pull-up Enable bit
To achieve a 1:1 prescaler assignment for the TMR0 register, assign the prescaler
to the Watchdog Timer.
TMR0 Rate
pull-ups on PORTB, while devices that have the GPPU have the weak pull-ups on
the GP Port.
INTEDG
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
R/W-1
WDT Rate
W = Writable bit
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
R/W-1
T0CS
R/W-1
T0SE
- n = Value at POR reset
R/W-1
PSA
R/W-1
PS2
R/W-1
PS1
DS31026A-page 26-3
bit 0
R/W-1
PS0
26
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