PI6C671F 查看數據表（PDF） - Pericom Semiconductor Corporation
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PI6C671F Datasheet PDF : 7 Pages
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PI6C671F
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Pin Descriptions
Signal Name
Type Qty
Pin
Description
1
Xin
Xout
SEL66/60#
I
1
O
1
I
1
4
Crystal oscillator input or input for externally generated reference signal.
5
Crystal oscillator output. Connect to external parallel resonant crystal.
2
18
Select pin for enabling 66 MHz or 60 MHz.
H=66 MHz, L=60 MHz. Has an internal pull-up resistor.
CPUCLK (0-3)
SDRAM
O
4
42,41,39,38 CPU & Host clock outputs. Powered by VDDQ2, can be 2.5V or 3.3V.
O
6 29,30,32,33,35,36 SDRAM clocks 60/66 MHz. Powered by VDDQ3(3.3V).
3
SDRAM6/CPU_STOP# bi-dir 1
27
MODE=1: SDRAM6, MODE=0: CPU_STOP#.
SDRAM7/PCI_STOP# bi-dir 1
MODE
I
1
26
MODE=1: SDRAM7, MODE=0: PCI_STOP#.
6
Mode Select pin for enabling power management features at pins 26 & 27.
4
Has an internal pull-up resistor.
PCICLK(0-5)
PCICLK_F
O
6
9,11,12,13,14,16 Low skew PCI clock outputs. TTL compatible. Powered by VDDQ3 (3.3V).
5
O
1
8
Free running synchronous PCI clock. Stops when in shut down mode.
REF0,REF1,REF2
O
3
2,1,47
14.318 MHz buffered reference clock outputs.
IOAPIC0
O
1
45
IOAPIC0 clock outputs. Powered by VDDQ1, can be 2.5V or 3.3V
PWR_DWN#
I
1
44
PWR_DWN#, active LOW.
6
48/24MHz
O
2
22,23
Selectable 48/24 MHz clock output. Powered by VDDQ3 (3.3V).
SDATA
I
1
19
Serial data input for I2C control.
SDCLK
I
1
20
Clock input for I2C control.
7
VSS
Ground 7 3,10,17,24,31,37,43 Ground pins for the device.
VDD
Power 2
25,48
Power supply for analog circuits and core logic.
8
VDDQ3
Power 5
7,15,21,28,34 3.3V I/O power supply.
VDDQ2
Power 1
40
CPUCLK power supply. Can be either 2.5V or 3.3V.
9
VDQ1
Power 1
46
IOAPIC power supply. Can be either 2.5V or 3.3V.
Driver Types
10
Pin
Driver Type Symbol
Description
11
2
D
REF0 14.318 MHz clock output.
1,47
C
REF1, REF2 14.318 MHz clock output.
12
8
E
PCICLK_F Free running clock during PCICLK stopped.
9,11,12,
13.14,16
E
PCICLK PCI clock outputs TTL compatible 3.3V.
13
22,23
C
48/24MHz 48/24 MHz clock output 3.3V selectable.
26,27,29,30,
32,33,35,36
D
SDRAM SDRAM clocks 60/66 MHz.
14
38,39,41,42
A
CPUCLK CPU and host clock outputs: 2.5V or 3.3V
15
45
B
IOAPIC0,
IOAPIC1
IOAPIC clock output: 2.5V or 3.3V.
393
PS8137A 03/15/99
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