TI380PCIA Datasheet, PDF (8/40 Pages) Texas Instruments – PCI BUS INTERFACE FOR THE TI380 COMMPROCESSORS

TI380PCIA
PCI BUS INTERFACE FOR THE TI380 COMMPROCESSORS™
SPWS035 – JUNE 1997
Terminal Functions (Continued)
TERMINAL
NAME
NO.
MBCLK1
131
MADH00
99
MADH01
98
MADH02
97
MADH03
96
MADH04
95
MADH05
93
MADH06
92
MADH07
91
I/O†
DESCRIPTION
BURNED-IN ADDRESS EMULATION INTERFACE (BIF)^||
I Local memory bus clock 1.
Local memory address, data, and status bus — high byte. For the first quarter of the local memory cycle,
I/O
MADH00 – MADH07 monitor address bits AX4 and A0 to A6; for the second quarter, they monitor status
bits, and for the third and fourth quarters, they carry data bits 0 to 7. The most significant bit is MADH00,
and the least significant bit is MADH07.
MBIAEN
19
I
Burned-in address enable. MBIAEN enables the output of data on the MADHxx lines during BIA
accesses.
MAX2
18
I
Local memory extended address bit. For the first quarter of a local memory cycle MAX2 monitors AX2.
For quarters two through four, MAX2 monitors A14.
MAX0
9
I
Local memory extended address bit. For the first quarter of a local memory cycle MAX0 monitors AX0.
For quarters two through four, MAX0 monitors A12.
MROMEN
8
I MROMEN monitors the local memory bus ROM enable signal.
† _{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.
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