OXCB950
OXFORD SEMICONDUCTOR LTD.
2
Multi-purpose & External
interrupt pins
Dir
Name
Description
26
27
T_I/O
MIO[0]
MIO[1]
Multi-purpose I/O pins.
T_I/O
Can be driven high or low, or be used to invoke
cardbus/PCI interrupts, and powerdown, wakeup requests.
EEPROM pins
28
29
31
O
O
EE_CK
EE_CS
EE_DI
EEPROM clock
EEPROM active-high Chip Select
IU
EEPROM data in (to be connected to the EEPROM DO
pin).
When the optional serial EEPROM is connected, this pin
should be pulled up using an external 1-10k resistor. When
the EEPROM is not used, this external pull-up is not
required (internal pull-up is sufficient).
EEPROM data out. (to be connected to the EEPROM DI
pin)
30
O
EE_DO
Miscellaneous pins
34
33
ID
ID
TEST0
TEST1
Test Pin 0. Should be held low at all times.
Test Pin 1. Should be held low at all times
3
Power and ground
14, 63, 89
7, 21, 56, 71, 81, 91
38, 39
V
V
V
VDD3I_CB
VDD3OP_CB
VDDIP
Supplies power to the pre-drive area of the dual mode
cardbus/pci IO buffers.
Supplies power to the output drive of the dual mode
cardbus/pci IO buffers.
Supplies power to the core-logic and pre-drive area of the
standard IO buffers.
41,
V
VDDO
Suppiles power to the output drive of standard IO buffers.
Supplies ground to the pre-drive area of the dual mode
cardbus/pci IO buffers.
13, 62, 87
G
VSSI_CB
2, 6, 12, 20, 55, 64, 65, 70, 76,
G
G
G
VSSOP_CB
VSSIP
Supplies ground to the output drive of the dual mode
cardbus/pci IO buffers.
82, 90, 92, 97
35
Supplies gnd to the core-logic and pre-drive area of the
standard IO buffers.
40, 50
VSSO
Supplies gnd to the output drive of standard IO buffers.
Table: Pin Descriptions
Note 1:
For cardbus applications, the pin z_frame requires a pull-up (4k7) on the board. See PC Card Standard 7.0/7.1, section 5.3.3.3.3
“pull-up resistor requirements”.
Note 2: Direction key:
I
3.3v Input, TTL compatible
C/P_I
Cardbus/PCI compatible input
ID
3.3v Input with pull-down, TTL compatible
3.3v Input with pull-up, TTL compatible
3.3v Output, TTL compatible
5.0v tolerant TTL output
C/P_O Cardbus/PCI compatible output
C/P_I/O Cardbus/PCI compatible bi-directional
C/P_OD Cardbus/PCI compatible open drain
IU
O
T_O
T_I
T_I/O
5.0v tolerant TTL input
G
V
Ground
5.0v tolerant TTL Bi-directional
3.3V power
DS-0033 Sep 05
External-Free Release
Page 10
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