EM78P468LAQ EMC [ELAN Microelectronics Corp], EM78P468LAQ Datasheet - Page 42

• Manufacturer Part Number: EM78P468LAQ
• Description: 8-BIT Microcontroller
• Manufacturer: EMC [ELAN Microelectronics Corp]

EM78P468L
8-BIT Microcontroller
38 •
4.6.4
If both precision and cost are taken into consideration, This LSI also offers a special
oscillation mode, which is equipped with an internal capacitor and an external resistor
connected to VDD. The internal capacitor functions as temperature compensator. In
order to obtain more accurate frequency, a precise resistor is recommended.
Table 6 RC Oscillator Frequencies
Note: Measured from QFP packages with frequency drift of about ± 30%.
Values are provided for design reference only.
R-OSCI
Pin
Xin
RC Oscillator Mode with Internal Capacitor
Rext
100k
300k
2.2M
51k
Fig. 11 Circuit for Internal C Oscillator Mode
Average Fosc 5V, 25°C Average Fosc 3V, 25°C
R-OSCI or Xin
EM78P468N
2.2221 MHz
1.1345 MHz
381.36KHz
32.768KHz
(This specification is subject to change without further notice)
Product Specification (V1.0) 03.15.2006
VDD
Rext
2.1972 MHz
1.1203 MHz
374.77 KHz
32.768KHz