PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 130

• Manufacturer Part Number: PIC16C774
• Description: 28/40-pin, 8-bit Cmos Microcontrollers W/ 12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C77X
12.2.3
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
erances of external R and C components used need to
be taken into account for each application.
shows how the R/C combination is connected to the
PIC16C77X.
FIGURE 12-4: RC OSCILLATOR MODE
DS30275A-page 130
EXT
Cext
V
Rext
SS
EXT
values. These factors and the variation due to tol-
V
DD
RC OSCILLATOR
) and capacitor (C
Fosc/4
OSC1
OSC2/CLKOUT
EXT
) values, and the operat-
PIC16C77X
Figure 12-4
Internal
Advance Information
clock
1999 Microchip Technology Inc.