www.national.com
18
Revision 3.0
G
2.0
This section defines the signals and describes the external
interface of the SC2200. Figure 2-1 shows the signals
organized by their functional groups. Where signals are
multiplexed, the default signal name is listed first and is
separated by a plus sign (+). A slash (/) in a signal name
means that the function is always enabled and available
(i.e., cycle multiplexed).
Signal Definitions
The remaining subsections of this chapter describe:
Section 2.1 "Ball Assignments": Provides a ball assign-
ment diagram and tables listing the signals sorted
according to ball number and alphabetically by signal
name.
Section 2.2 "Strap Options": Several balls are read at
power-up that set up the state of the SC2200. This
section provides details regarding those balls.
Section 2.3 "Multiplexing Configuration": Lists multi-
plexing options and their configurations.
Section 2.4 "Signal Descriptions": Detailed descriptions
of each signal according to functional group.
Figure 2-1. Signal Groups
System
Interface
POR#
X32I
X32O
X27I
X27O
MD[63:0]
MA[12:0]
BA[1:0]
CS[1:0]#
RASA#
CASA#
WEA#
DQM[7:0]
CKEA
SDCLK[3:0]
SDCLK_IN
SDCLK_OUT
ACCESS.bus
Interface
AB1C+GPIO20+DOCCS#
AB1D+GPIO1+IOCS1#
GPIO12+AB2C
GPIO13+AB2D
CRT
Interface
HSYNC
VSYNC
VREF
SETRES
RED, GREEN, BLUE
PCIRST#
BOOT16+ROMCS#
LPC_ROM+PCICLK1
TFT_PRSNT+SDATA_OUT
FPCI_MON+PCICLK0
DID0+GNT0#, DID1+GNT1#
ACK#+TFTDE
AFD#/DSTRB#+TFTD2
BUSY/WAIT#+TFTD3
ERR#+TFTD4
INIT#+TFTD5
PD7+TFTD13
PD[5:0]+TFTD[11:6]
PE+TFTD14
SLCT+TFTD15
SLIN#/ASTRB#+TFTD16
STB#/WRITE#+TFTD17
Parallel Port/
TFT Interface
IDE_ADDR2+TFTD4
IDE_ADDR1+TFTD2
IDE_ADDR0+TFTD3
IDE_DATA15+TFTD7
IDE_DATA14+TFTD17
IDE_DATA13+TFTD15
IDE_IOR0#+TFTD10
IDE_IOW0#+TFTD9
IDE_CS0#+TFTD5
IDE_CS1#+TFTDE
IDE_IORDY0+TFTD11
IDE_DREQ0+TFTD8
IDE_DACK0#+TFTD0
IDE_RST#+TFTDCK
IRQ14+TFTD1
IDE/TFT
Interface
IDE_DATA12+TFTD13
IDE_DATA11+GPIO41
IDE_DATA10+DDC_SCL
IDE_DATA9+DDC_SDA
IDE_DATA8+GPIO40
IDE_DATA7+INTD#
IDE_DATA6+IRQ9
IDE_DATA5+CLK27M
IDE_DATA4+FP_VDD_ON
IDE_DATA3+TFTD12
IDE_DATA2+TFTD14
IDE_DATA1+TFTD16
IDE_DATA0+TFTD6
PD6+TFTD1
Memory
Interface
VPD[7:0]
VPCKIN
Video Port
Interface
Geode
SC2200
Straps
Note:
Straps are not the default signal, shown with system signals for reader convenience. However, also listed in figure with the
appropriate functional group.