SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 56

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Signal Definitions
2.4
Information in the tables that follow may have duplicate information in multiple tables. Multiple references all contain identi-
cal information.
2.4.1
Signal Name
CLKSEL1
CLKSEL0
CLKSEL3
CLKSEL2
BOOT16
LPC_ROM
TFT_PRSNT
FPCI_MON
SIGNAL DESCRIPTIONS
System Interface
EBGA
AK13
AL13
AK3
B27
G4
E4
D3
F3
(Continued)
Ball No.
TEPBGA
AF3
D29
P30
P29
C8
D6
B8
A4
Type
I
I
I
I
I
I
Description
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.
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.
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.
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.
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.
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
strap can be read on the MCR[30].
56
resistor. The value of this
SDATA_OUT
ROMCS#
PCICLK1
PCICLK0
SOUT1
SOUT2
SYNC
Mux
RD#
Revision 3.0