PIC16C432-E/SS Microchip Technology, PIC16C432-E/SS Datasheet - Page 47

• Manufacturer Part Number: PIC16C432-E/SS
• Description: IC MCU CMOS 8BIT 20MHZ 2K 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C432-E/SS

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: LIN (Local Interconnect Network)
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 12
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-SSOP
• For Use With: XLT20SS-1 - SOCKET TRANSITION 18DIP 20SSOPAC164307 - MODULE SKT FOR PM3 28SSOPAC164029 - MODULE SKT PROMATEII 20DIP/SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

9.2
9.2.1
The PIC16C432 can be operated in four different
oscillator options. The user can program two
configuration bits (FOSC1 and FOSC0) to select one of
these four modes:
• LP - Low Power Crystal
• XT - Crystal/Resonator
• HS - High Speed Crystal/Resonator
• RC - Resistor/Capacitor
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 9-1). The PIC16C432 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 9-2).
FIGURE 9-1:
FIGURE 9-2:
Note 1: See Table 9-1 and Table 9-2 for recom-
2002 Microchip Technology Inc.
Clock from
ext. system
Open
2: A series resistor may be required for AT strip
C1
C2
Oscillator Configurations
OSCILLATOR TYPES
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
mended values of C1 and C2.
cut crystals.
Note 2
XTAL
R
S
OSC1
OSC2
CRYSTAL OPERATION
(OR CERAMIC
RESONATOR) (HS, XT OR
LP OSC
CONFIGURATION)
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR
LP OSC
CONFIGURATION)
OSC1
OSC2
RF
PIC16C432
PIC16C432
To Internal Logic
SLEEP
Preliminary
TABLE 9-1:
TABLE 9-2:
XT
HS
These values are for design guidance only. See
notes at bottom of page.
LP
XT
HS
These values are for design guidance only. See
notes at bottom of page.
Osc Type
Mode
Note 1: Recommended values of C1 and C2 are
2: Higher capacitance increases the stability
3: Since each resonator/crystal has its own
4: Rs may be required in HS mode, as well
indentical to the ranges tested table.
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
16.0 MHz
of oscillator, but also increases the start-
up time.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate values of external compo-
nents.
as XT mode, to avoid over driving crystals
with low drive level specification.
32 kHz
200 kHz
200 kHz
1 MHz
4 MHz
4 MHz
8 MHz
20 MHz
Crystal
Freq
Freq
CERAMIC RESONATORS,
PIC16C432
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR,
PIC16C432
Ranges Tested:
33 pF
15 pF
47-68 pF
15 pF
15 pF
15 pF
15-33 pF
15-33 pF
PIC16C432
68 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
Cap. Range
OSC1
C1
DS41140B-page 45
33 pF
15 pF
47-68 pF
15 pF
15 pF
15 pF
15-33 pF
15-33 pF
68 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
Range C2
OSC2
Cap.