W320-03
Pin Summary
Name
REF
XTAL_IN
XTAL_OUT
CPU, CPU# [0:2]
3V66_0
3V66_1/VCH
66IN/3V66_5
66BUFF [2:0] /3V66
[4:2]
PCI_F [0:2]
PCI [0:6]
USB
DOT
S2
S1, S0
IREF
MULT0
PWR_DWN#
PCI_STOP#
CPU_STOP#
PWRGD#
Pins
56
2
3
Description
3.3V 14.318 MHz clock output
14.318 MHz crystal input
14.318 MHz crystal input
44, 45, 48, 49, 51,
Differential CPU clock outputs
52
33
35
24
21, 22, 23
5, 6, 7,
3.3V 66 MHz clock output
3.3V selectable through SMBus to be 66 MHz or 48 MHz
66 MHz input to buffered 66BUFF and PCI or 66 MHz clock from internal VCO
66 MHz buffered outputs from 66Input or 66 MHz clocks from internal VCO
33 MHz clocks divided down from 66Input or divided down from 3V66
10, 11, 12, 13, 16,
PCI clock outputs divided down from 66Input or divided down from 3V66
17, 18
39
38
40
54, 55
42
43
25
34
53
28
Fixed 48 MHz clock output
Fixed 48 MHz clock output
Special 3.3V 3 level input for Mode selection
3.3V LVTTL inputs for CPU frequency selection
A precision resistor is attached to this pin which is connected to the internal
current reference
3.3V LVTTL input for selecting the current multiplier for the CPU outputs
3.3V LVTTL input for Power_Down# (active LOW)
3.3V LVTTL input for PCI_STOP# (active LOW)
3.3V LVTTL input for CPU_STOP# (active LOW)
3.3V LVTTL input is a level sensitive strobe used to determine when S[2:0] and
MULTI0 inputs are valid and OK to be sampled (Active LOW).
Once PWRGD#
is sampled LOW, the status of this output will be ignored.
SMBus compatible SDATA
SMBus compatible Sclk
SDATA
SCLK
29
30
VDD_REF, VDD_PCI, 1, 8, 14, 19, 32, 46,
3.3V power supply for outputs
VDD_3V66,
50
VDD_CPU
VDD_48 MHz
VDD_CORE
37
26
3.3V power supply for 48 MHz
3.3V power supply for PLL
GND_REF, GND_PCI, 4, 9, 15, 20, 31, 36,
Ground for outputs
GND_3V66,
41, 47
GND_IREF,
VDD_CPU
GND_CORE
27
Ground for PLL
Rev 1.0, November 25, 2006
Page 2 of 16
SPECTRALINEAR [ SPECTRALINEAR INC ]
