May 2008
rev 0.2
Pin Configuration
PCS3P2189A
CLKIN / XIN
1
XOUT
2
8
7
VDD
ModOUT
VSS
S0
PCS3P2189A
SSON
3
S1
4
6
5
Pin Description
Pin#
1
2
3
4
5
6
7
8
Pin Name
CLKIN / XIN
XOUT
SSON
S1
S0
VSS
ModOUT
VDD
Type
I
O
I
I
O
P
O
P
Description
Crystal connection or External reference Clock Input
Crystal connection. If using an external reference, this pin must be left
unconnected.
Modulation enables pin. When HIGH enables spread spectrum modulation. Has an
Internal pull up resistor
Spread range select. Digital logic input used to select frequency deviation
(Refer
Spread Deviation Table).
This pin has an internal pull-up resistor.
Spread range select. Digital logic input used to select frequency deviation
(Refer
Spread Deviation Table).
This pin has an internal pull-up resistor.
Ground Connection. Connect to system ground.
Low EMI 4x clock output.
Power Supply Voltage Pin. Connect to +3.3V.
Spread Deviation Selection Table
(For an Input CLK=15MHz)
S1
0
0
1
1
S0
0
1
0
1
Deviation (
± %)
0.5
1.0
1.5
2.0
Modulation Enable Setting Table
SSON
L
H
Modulation
No Modulation
Modulation
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
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PULSECORE [ PulseCore Semiconductor ]
