W83L197R-16 Datasheet, PDF (4/11 Pages) Winbond – 2-CHIP 100MHZ CLOCK FOR BX NOTEBOOK

W83L197R-16
5.4 Power Pins
SYMBOL
VddC
Vdd3
Vss
PRELIMINARY
PIN
25
6,9,13,21,27
3, 12,14,20,22,28
FUNCTION
Power supply for core logic and PLL circuitry. Connect
to 3.3V supply.
Power supply for others Connect to 3.3V supply.
Circuit Ground.
6.0 FREQUENCY SELECTION
FS0*
SEL100/66#
1
1
1
0
0
1
0
0
CPUCLK0, CPUCLK1
100MHz
66.8MHz
112MHz
103MHz
PCI
33.3MHz
33.4MHz
37.3MHz
34.33MHz
7.0 FUNTION DESCRIPTION
7.1 SPREAD SPECTRUM FUNCTION SELECTION TABLE
SPREAD*
1
0
Spread Spectrum
¡Ó0.5%
¡Ó0.75%
Type
Center
Center
7.2 POWER MANAGEMENT FUNCTIONS
The W83L197R-16 may be disabled in the low state according to the following table in order to
reduce power consumption. All clocks are stopped in the low state, but maintain a valid high period
on transitions from running to stop. The CPU and PCI clocks transform between running and stop by
waiting for one positive edge on PCICLK_F followed by negative edge on the clock of interest, after
which high levels of the output are either enabled or disabled.
CPU_STOP# PCI_STOP#
CPUCLK1
PCICLK1:5
PCICLK_F XTAL & VCOs
0
0
LOW
LOW
RUNNING
RUNNING
0
1
LOW
RUNNING
RUNNING
RUNNING
1
0
RUNNING
LOW
RUNNING
RUNNING
1
1
RUNNING
RUNNING
RUNNING
RUNNING
Publication Release Date: Mar. 1999
-4-
Revision 0.10