S1K50000 Datasheet, PDF (52/130 Pages) Epson Company – Standard-Cell Development Flow

Chapter 3: Types of Input/Output Buffers and Usage Precautions
3.3 Configuration of Oscillator Circuits
3.3.1 When Configuring an Oscillator Circuit
In the configuration of an oscillator circuit, one of the configurations shown in Figure 3-5
applies, depending on the oscillator cell used. The input and output cells used in this case are
a combination of XLIN and XLOUT.
G
X
Oscillator cell
XLIN
PAD
Internal to the IC
Rf
X
D
A
XLOT
PAD
Rd
G
E
X
Oscillator cell
XLIN
PAD
Internal to the IC
Rf
X
D
A
XLOT
PAD
Rd
X’tal
Cg
Cd
X’tal
Cg
Cd
For continuous oscillation
For intermittent oscillation
Figure 3-5 Method for Configuration of an Oscillator Circuit
STANDARD CELL S1K50000 SERIES
EPSON
47
DESIGN GUIDE