Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 44
2−18
Table 2−9. Multifunction and Miscellaneous Terminals
The power rail designation is not applicable for the multifunction and miscellaneous terminals.
TERMINAL
DESCRIPTION
I/O
INPUT
OUTPUT
PU/
EXTERNAL
PIN STRAPPING
NAME
NO.
DESCRIPTION
I/O
TYPE
INPUT
OUTPUT
PU/
PD
EXTERNAL
COMPONENTS
PIN STRAPPING
(IF UNUSED)
A_USB_EN
B_USB_EN
E02
E01
USB enable. These output terminals control an
external CBT switch for each socket when an USB
card is inserted into the socket.
O
LVCO1
CBT switch
Float
CLK_48
M01
A 48-MHz clock must be connected to this terminal.
I
LVCI1
48 MHz clock
source
MFUNC0
N03
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
MFUNC1
M05
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
MFUNC2
P01
Multifunction terminals 0−6. See Section 4.36,
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
MFUNC3
P02
Multifunction terminals 0−6. See Section 4.36,
Multifunction Routing Status Register, for
configuration details.
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
MFUNC4
P03
configuration details.
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
MFUNC5
N05
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
MFUNC6
R01
I/O
PCII3
PCIO3
10-k
Ω
to 47-k
Ω
pullup resistor
NC
W17
Reserved. This terminal has no connection
anywhere within the package.
Float
PHY_TEST_
MA
R17
PHY test pin. Not for customer use. It must be pulled
high with a 4.7-k
Ω
resistor.
I
LVCI1
PD1
NA
RI_OUT/
PME
T03
Ring indicate out and power management event
output. This terminal provides an output for
ring-indicate or PME signals.
O
LVCO2
Pullup resistor per
PCI specification
NA
RSVD
T19
Reserved. This terminal has no connection
anywhere within the package.
—
Float
SCL
M03
Serial clock. At PRST, the SCL signal is sampled to
determine if a two-wire serial ROM is present. If the
serial ROM is detected, then this terminal provides
the serial clock signaling and is implemented as
open-drain. For normal operation (a ROM is
implemented in the design), this terminal must be
pulled high to the ROM VDD with a 2.7-k
Ω
resistor.
Otherwise, it must be pulled low to ground with a
220-
Ω
resistor.
I/O
TTLI1
TTLO1
Pullup resistor per
I2C specification
(value depends on
EEPROM,
typically 2.7 k
Ω
)
Tie to GND if not
using EEPROM
SDA
M02
Serial data. This terminal is implemented as
open-drain, and for normal operation (a ROM is
implemented in the design), this terminal must be
pulled high to the ROM VDD with a 2.7-k
Ω
resistor.
Otherwise, it must be pulled low to ground with a
220-
Ω
resistor.
I/O
TTLI1
TTLO1
Pullup resistor per
I2C specification
(value depends on
EEPROM,
typically 2.7 k
Ω
)
Tie to GND if not
using EEPROM
SPKROUT
L07
Speaker output. SPKROUT is the output to the host
system that can carry SPKR or CAUDIO through the
controller from the PC Card interface. SPKROUT is
driven as the exclusive-OR combination of card
SPKR//CAUDIO inputs.
O
TTLO1
10-k
Ω
to 47-k
Ω
pulldown resistor
10-k
Ω
to 47-k
Ω
pulldown resistor
SUSPEND
R02
Suspend. SUSPEND protects the internal registers
from clearing when the GRST or PRST signal is
asserted. See Section 3.8.6, Suspend Mode, for
details.
I
PCII6
10-k
Ω
to 47-k
Ω
pullup resistor
10-k
Ω
to 47-k
Ω
pullup resistor
TEST0
P12
Terminal TEST0 is used for factory test of the
controller and must be connected to ground for
normal operation.
I/O
LVCI1
PD1
Tie to GND