W83L197R-16 Datasheet, PDF (3/11 Pages) Winbond – 2-CHIP 100MHZ CLOCK FOR BX NOTEBOOK

W83L197R-16
5.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
# - Low active
* - Internal 250kΩ pull-up
5.1 Crystal I/O
SYMBOL
PIN
Xin
1
Xout
2
PRELIMINARY
I/O
IN
OUT
FUNCTION
Crystal input with internal loading capacitors and
feedback resistors.
Crystal output at 14.318MHz nominally.
5.2 CPU, PCI Clock Outputs
SYMBOL
CPUCLK0
CPUCLK1
PIN
24,23
PCICLK [ 1:5 ]
PCICLK_F
PCI_STOP#
5,7,8,10,11
4
19
CPU_STOP#
18
I/O
OUT
OUT
FUNCTION
Low skew (< 250ps) clock outputs for host
frequencies such as CPU, Chipset and Cache.
VddC is the supply voltage for these outputs.
Low skew (< 250ps) PCI clock outputs.
I/O PCI_STOP# input used in power management mode
for synchronously stopping the all CPU clocks.
I/O this pin is CPU_STOP # and used in power
management mode for synchronously stopping the
all PCI clocks.
5.3 Fixed Frequency Outputs
SYMBOL
PIN
SEL100/66#
15
REF2X / FS0*
26
48MHz/SPREAD*
16
I/O
FUNCTION
IN CPU clock frequency select pin.
I/O Internal 250kΩ pull-up.
Latched input for FS0* to chose frequencies at initial
power up.
Reference clock during normal operation.
I/O Internal 250kΩ pull-up.
48MHz output for USB during normal operation.
Latched input for SPREAD* to select the spread
spectrum spend at initial power up.
Publication Release Date: Mar. 1999
-3-
Revision 0.10