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56
Revision 3.0
G
Signal Definitions
(Continued)
2.4
Information in the tables that follow may have duplicate information in multiple tables. Multiple references all contain identi-
cal information.
SIGNAL DESCRIPTIONS
2.4.1
System Interface
Signal Name
Ball No.
Type
Description
Mux
EBGA
TEPBGA
CLKSEL1
B27
AF3
I
Fast-PCI Clock Selects.
These strap signals
are used to set the internal Fast-PCI clock.
00 = 33.3 MHz
01 = 48 MHz
10 = 66.7 MHz
11 = 33.3 MHz
During system reset, an internal pull-down
resistor of 100 K
exists on these balls. An
external pull-up or pull-down resistor of 1.5
K
must be used.
SOUT1
CLKSEL0
F3
B8
RD#
CLKSEL3
AL13
P30
I
Maximum Core Clock Multiplier.
These
strap signals are used to set the maximum
allowed multiplier value for the core clock.
During system reset, an internal pull-down
resistor of 100 K
exists on these balls. An
external pull-up or pull-down resistor of 1.5
K
must be used.
SYNC
CLKSEL2
AK3
D29
SOUT2
BOOT16
G4
C8
I
Boot ROM is 16 Bits Wide.
This strap signal
enables the optional 16-bit wide Sub-ISA
bus.
During system reset, an internal pull-down
resistor of 100 K
exists on these balls. An
external pull-up or pull-down resistor of 1.5
K
must be used.
ROMCS#
LPC_ROM
E4
D6
I
LPC_ROM.
This strap signal forces selecting
of the LPC bus and sets bit F0BAR1+I/O Off-
set 10h[15], LPC ROM Addressing Enable. It
enables the SC2200 to boot from a ROM
connected to the LPC bus.
During system reset, an internal pull-down
resistor of 100 K
exists on these balls. An
external pull-up or pull-down resistor of 1.5
K
must be used.
PCICLK1
TFT_PRSNT
AK13
P29
I
TFT Present.
A strap used to select multi-
plexing of TFT signals at power-up. Enables
using TFT instead of Parallel Port, ACB1,
and GPIO17.
During system reset, an internal pull-down
resistor of 100 K
exists on these balls. An
external pull-up or pull-down resistor of 1.5
K
must be used.
SDATA_OUT
FPCI_MON
D3
A4
I
Fast-PCI Monitoring.
The strap on this ball
forces selection of Fast-PCI monitoring sig-
nals. For normal operation, strap this signal
low using a 1.5 K
resistor. The value of this
strap can be read on the MCR[30].
PCICLK0