OX16PCI954
OXFORD SEMICONDUCTOR LTD.
Mode
Dir1
Name
Description
00
01
10
11
Subsystem ID & Subsystem Vendor ID pins
131-124,
117-114,
91-88
N/A
N/A
I
Sub_ID[15:0]
Subsystem ID. After reset the subsystem ID of Function 0
will default to the value assigned to these pins
121-118,
108-105,
101-98,
95-92
N/A
N/A
I
Sub_V_ID[15:0] Subsystem Vendor ID. After reset the subsystem vendor ID
of Function 0 will default to the value assigned to these pins.
Multi-purpose & External interrupt pins
131
N/A
N/A
131
I/O
MIO0
Multi-purpose I/O 0. Can drive high or low, or assert a PCI
interrupt
N/A
130
131
130
N/A
N/A
N/A
130
Z
I/O
Hi-Z
MIO1
Permanent high impedance
Multi-purpose I/O 1. Can drive high or low, or assert a PCI
interrupt
Z
I/O
Hi-Z
MIO2
Permanent high-impedance when LCC[6:5] ≠ ‘00’
Multi-purpose I/O 2. When LCC[7] = 0, this pin can drive high
or low, or assert a PCI interrupt.
129
129
N/A
N/A
129
I
PME_In
Input power management event. When LCC[7] is set this
input pin can assert a function 1 PME#
Multi-purpose I/O pins. Can drive high or low, or assert a PCI
interrupt
124-128
124-8,
88-91
I/O
MIO[3:11]
88-91
EEPROM pins
41
39
42
O
O
IU
EE_CK
EE_CS
EE_DI
EEPROM clock
EEPROM active-high Chip Select
EEPROM data in. When the serial EEPROM is connected,
this pin should be pulled up using 1-10k resistor. When the
EEPROM is not used the internal pullup is sufficient.
EEPROM data out.
40
O
EE_DO
Miscellaneous pins
43
44,45
IU
I
TEST
Mode[1:0]
Must be connected to GND
Mode selector:
00: Function 0 is Quad UART, Function 1 is 8-bit local bus
01: Function 0 is Quad UART, Function 1 is parallel port
10: Function 0 is Quad UART, Function 1 is unusable as the
local bus pins are used to assign Subsystem ID and
Subsystem Vendor ID to function 0
11: Function 0 is unusable, Function 1 is 32-bit local bus
Power and ground2
18, 31, 57, 72, 97, 111, 147, 157
22, 65, 104, 137
V
V
AC VDD
DC VDD
Supplies power to output buffers in switching (AC) state
Power supply. Supplies power to core logic, input buffers
and output buffers in steady state
8, 17, 25, 30, 35, 56, 70, 96, 110,
142, 146, 153, 158
G
G
AC GND
DC GND
Supplies GND to output buffers in switching (AC) state
21, 62, 103, 135
Ground (0 volts). Supplies GND to core logic, input buffers
and output buffers in steady state
Table 2: Pin Descriptions
DS-0029 Jul 05
External—Free Release
Page 12
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