PIC16F870T-I/SS Microchip Technology, PIC16F870T-I/SS Datasheet - Page 92

• Manufacturer Part Number: PIC16F870T-I/SS
• Description: IC MCU FLASH 2KX14 EE 28SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F870T-I/SS

• 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 ~ 85°C
• Package / Case: 28-SSOP
• For Use With: I3-DB16F871 - BOARD DAUGHTER ICEPIC3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F870/871
TABLE 11-2:
DS30569B-page 90
These values are for design guidance only.
See notes following this table.
Osc Type
200 kHz
20 MHz
32 kHz
1 MHz
4 MHz
8 MHz
Note 1: Higher capacitance increases the stability
XT
HS
LP
2: Since each resonator/crystal has its own
3: R
4: When migrating from other PICmicro
EPSON CA-301 20.000M-C
EPSON CA-301 8.000M-C
of oscillator, but also increases the
start-up time.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate values of external components.
as XT mode, to avoid overdriving crystals
with low drive level specification.
devices, oscillator performance should be
verified.
Epson C-001R32.768K-A
200 kHz
200 kHz
20 MHz
Crystal
32 kHz
s
1 MHz
4 MHz
4 MHz
8 MHz
Freq.
STD XTL 200.000KHz
may be required in HS mode, as well
ECS ECS-10-13-1
ECS ECS-40-20-1
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Crystals Used
Cap. Range
47-68 pF
15-33 pF
15-33 pF
33 pF
15 pF
15 pF
15 pF
15 pF
C1
Cap. Range
± 20 PPM
± 20 PPM
± 50 PPM
± 50 PPM
± 30 PPM
± 30 PPM
47-68 pF
15-33 pF
15-33 pF
33 pF
15 pF
15 pF
15 pF
15 pF
C2
®
11.2.3
For timing insensitive applications, the “RC” device
option offers additional cost savings. The RC oscillator
frequency is a function of the supply voltage, the resis-
tor (R
ing temperature. In addition to this, the oscillator
frequency will vary from unit to unit due to normal pro-
cess parameter variation. Furthermore, the difference
in lead frame capacitance between package types will
also affect the oscillation frequency, especially for low
C
variation due to tolerance of external R and C
components used. Figure 11-3 shows how the R/C
combination is connected to the PIC16F870/871.
FIGURE 11-3:
EXT
C
V
Recommended values: 3 k
R
EXT
SS
EXT
EXT
values. The user also needs to take into account
V
DD
) and capacitor (C
RC OSCILLATOR
F
OSC
/4
RC OSCILLATOR MODE
OSC1
OSC2/CLKO
C
 2003 Microchip Technology Inc.
EXT
EXT
> 20pF
) values, and the operat-
R
EXT
100 k
PIC16F870/871
Internal
Clock