TI380PCIA Datasheet, PDF (4/40 Pages) Texas Instruments – PCI BUS INTERFACE FOR THE TI380 COMMPROCESSORS

TI380PCIA
PCI BUS INTERFACE FOR THE TI380 COMMPROCESSORS™
SPWS035 – JUNE 1997
TERMINAL
NAME
NO.
I/O†
Terminal Functions
DESCRIPTION
DB9 / UTP
GND
Connector. The value on DB9 / UTP indicates the type of connector in use. Upon reset, the DB9 / UTP
89
O ^{value is 0.}
1 = D-Shell (DB9)
0 = UTP / 10BaseT
4
16
24
28
31
40
52
54
64
I Ground. These pins must be attached to the common system ground plane.
67
76
88
100
112
124
136
ICT supports in-circuit tests. ICT must be pulled high for normal operation of the TI380PCIA.
ICT
110
I
When pulled along with RST to a steady low state, all bidirectional signals in the TI380PCIA are
configured as inputs, and all output pins of the TI380PCIA are in 3-state mode.
ROMA07
ROMA06
ROMA05
ROMA04
ROMA03
ROMA02
ROMA01
ROMA00
101
102
ROM address. ROMA07 – ROMA00 form the least significant eight bits of the address for the RPL ROM.
The most significant bits (MSBs) of the ROM address are multiplexed onto the SADHx lines.
103
104
105
107
108
109
When RST is driven high, the value on ROMA07 – ROMA00 is latched into the board configuration
I / O register in the TI380PCIA configuration space. The value on ROMA07 – ROMA00 can be provided by
pullup and pulldown resistors that do not affect operation after reset. This feature allows designers to
support jumpers or board stuffing options that can be sensed by software that reads the board
configuration register. If pullup and pulldown resistors are not used, the contents of the board
configuration register are undefined after reset.
ROMCS
90
O
ROMCS enables the outputs of the ROM when the ROM has been accessed. ROMCS-enable allows
the data lines from the ROM to be driven.
† _{I = in, O = out}
‡ _{The TI380PCIA SIF pin names correspond to a subset of the system interface pins on a TI380C2x§. See the TI380C2x§ data sheets for more}
information on individual pins. Like-named pins on the TI380PCIA and TI380C2x§ system interfaces are intended to be connected to each
other.
§ _{TI380C3x devices can be used with TI380PCIA in the same way as TI380C2x devices.}
¶ _{Typical bit-ordering for Intel™ and Motorola™ processor buses}
# _{The signal connecting this pin to the TI380C2x§ also should be connected to a 4.7-kΩ pullup resistor.}
|| _{The TI380PCIA BIF pin names correspond to a subset of the local memory bus interface pins on a TI380C2x§. Like-named pins on the two}
devices are intended to be connected to each other. Consult the TI380C2x§ data sheets for more information on individual pins.
NOTE 1: The TI380PCIA allows driver software to set SBCLK output to a steady high state. This signal is driven to a steady high state during
power-down operations.
Intel is a trademark of Intel Incorporated.
Motorola is a trademark of Motorola, Inc.
4
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