PIC16C642-04/SO Microchip Technology, PIC16C642-04/SO Datasheet - Page 57

• Manufacturer Part Number: PIC16C642-04/SO
• Description: IC MCU OTP 4KX14 COMP 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C642-04/SO

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, WDT
• Number Of I /o: 22
• Program Memory Type: OTP
• Ram Size: 176 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC16C
• No. Of I/o's: 22
• Ram Memory Size: 176Byte
• Cpu Speed: 4MHz
• No. Of Timers: 1
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 176 B
• Interface Type: RS- 232
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

9.2
9.2.1
The PIC16CXXX can be operated in four different
oscillator modes. The user can program two
configuration bits (FOSC1 and FOSC0) to select one of
these four modes:
• LP
• XT
• HS
• RC
9.2.2
In XT, LP or HS modes a crystal or ceramic resonator
is connected to the OSC1 and OSC2 pins to establish
oscillation (Figure 9-2). The PIC16CXXX oscillator
design requires the use of a parallel cut crystal. Use of
a series cut crystal may give a frequency out of the
crystal manufacturers specifications. When in XT, LP or
HS modes, the device can have an external clock
source to drive the OSC1 pin (Figure 9-3).
FIGURE 9-2:
FIGURE 9-3:
See Table 9-1 or Table 9-2 for recommended val-
ues of C1 and C2.
1996 Microchip Technology Inc.
clock from
ext. system
Note:
Open
C1
C2
Oscillator Configurations
CRYSTAL OSCILLATOR / CERAMIC
RESONATORS
OSCILLATOR TYPES
Low Power Crystal
Crystal/Resonator
High Speed Crystal/Resonator
Resistor/Capacitor
A series resistor may be required for
AT strip cut crystals.
see Note
XTAL
RS
CRYSTAL OPERATION
(OR CERAMIC RESONATOR)
(HS, XT OR LP OSC
CONFIGURATION)
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR LP
OSC CONFIGURATION)
OSC1
OSC2
OSC1
OSC2
RF
PIC16CXXX
PIC16CXXX
To internal logic
SLEEP
Preliminary
PIC16C64X & PIC16C66X
TABLE 9-1:
TABLE 9-2:
XT
HS
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
16.0 MHz
32.768 kHz
100 kHz
200 kHz
2.0 MHz
4.0 MHz
10.0 MHz
20.0 MHz
Note: Recommended values of C1 and C2 are identical
Mode
XT
HS
LP
Mode
All resonators used did not have built-in capacitors.
to the ranges tested table.
Higher capacitance increases the stability of the
oscillator but also increases the start-up time.
These values are for design guidance only. Since
each resonator has its own characteristics, the
user should consult the resonator manufacturer for
appropriate values of external components.
Higher capacitance increases the stability of the
oscillator but also increases the start-up time.
These values are for design guidance only. Rs may
be required in HS mode as well as XT mode to
avoid overdriving crystals with low drive level spec-
ification. Since each crystal has its own
characteristics, the user should consult the crystal
manufacturer for appropriate values of external
components.
200 kHz
100 kHz
Panasonic EFO-A455K04B
Murata Erie CSA2.00MG
Murata Erie CSA4.00MG
Murata Erie CSA8.00MT
Murata Erie CSA16.00MX
10 MHz
20 MHz
32 kHz
2 MHz
4 MHz
8 MHz
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
16.0 MHz
Freq
Epson C-001R32.768K-A
Epson C-2 100.00 KC-P
STD XTL 200.000 kHz
ECS ECS-20-S-2
ECS ECS-40-S-4
ECS ECS-100-S-4
ECS ECS-200-S-4
Resonators used:
CAPACITOR SELECTION
FOR CERAMIC RESONATORS
(PRELIMINARY)
CAPACITOR SELECTION
FOR CRYSTAL OSCILLATOR
(PRELIMINARY)
Ranges tested:
Crystals used:
Freq
68 - 100 pF
68 - 150 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
OSC1
22 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
DS30559A-page 57
150 - 200 pF
OSC1
68 - 100 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
OSC2
0.3%
0.5%
0.5%
0.5%
0.5%
20 PPM
20 PPM
20 PPM
50 PPM
50 PPM
50 PPM
50 PPM