PI6C105 Просмотр технического описания (PDF) - Pericom Semiconductor
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PI6C105 Datasheet PDF : 15 Pages
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PI6C105
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Pin Description
Pin
Signal Name
Qty.
Description
1
XTAL_IN
1 14.318 MHz crystal input
2
XTAL_OUT
1 14.318 MHz crystal input
3
VSSPCI
1 Ground for PCI clock outputs
4
PCICLK_F
1 Free running PCI clock output
5,6,7,8,10 PCICLK[1:5]
5 PCI clock outputs, TTL compatible 3.3V
9
VDDPCI
1 Power for all PCI clock outputs (4,5,6,7,8,10)
11
VDDP2
1 Power Supply for 24 MHz and 48 MHz outputs
48 MHz/SPREAD#
48 MHz output or SPREAD# input. Internal pull up
12
48 MHz
1 48 MHz output for USB clock
SPREAD#
Active lowEnable Spread Spectrum mode, default disable. This is an input
sampled during power up. Becomes 48 MHz output after power up
13
VSSP2
1 Ground for 24 MHz and 48 MHz
24 MHz/SEL100/66#
24 MHz output or SEL100/66# input, internal pull up
14
24 MHz
1 24 MHz output for Super I/O Clock
SEL100/66#
During power up this pin is SEL100/66# input, 24MHz output otherwise.
Low = 66MHz, High = 100MHz
15
SCLK
1 Serial Clock for I2C interface. Internal Pull Up
16
SDATA
1 Serial Data for I2C interface. Internal Pull Up
17
PWR_DWN#
1
Active Lower Power Down, When active PLLs, crystal, and oscillator is
off. CPUCLKs and PCICLK clocks are held low. Internal Pull Up
18
CPU_STOP#
1
Active Low. Stops all CPU clocks to low state.
Internal Pull Up
Active Low. Stops all PCICLK clocks to low state, except for
19
PCI_STOP#
1 PCICLK_F. Internal Pull Up
20
21
22
23,24
25
26
27
28
VSSCORE
VDDCORE
VSSCPU
CPUCLK[0:1]
VDDCPU
REF
VDDREF
VSSREF
1 Ground for chip core
1 Power supply for chip core
1 Ground for CPU clock outputs
2 CPU and Host clock outputs 2.5V
1 Power supply for CPU clock outputs 2.5V
1 Buffered crystal output
1 Power Supply for REF outputs
1 Ground for REF outputs
249
PS8316 03/15/99
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