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P
TMS320DM6446
Digital Media System on-Chip
SPRS283–DECEMBER 2005
Table 2-19. GPIOV33 Terminal Functions (continued)
SIGNAL
NAME
IPD/
IPU
(2)
TYPE
(1)
DESCRIPTION
NO.
This pin is multiplexed between GPIO and Ethernet MAC. In GPIO mode, it is
3.3V GPIO GPIOV33_2.
In Ethernet MAC mode, it is Collision Detect input COL.
This pin is multiplexed between GPIO and Ethernet MAC. In GPIO mode, it is
3.3V GPIO GPIOV33_1.
In Ethernet MAC mode, it is Transmit Clock output TXCLK.
This pin is multiplexed between GPIO and Ethernet MAC. In GPIO mode, this pin
is 3.3V GPIO pin GPIOV33_0.
In Ethernet MAC mode, it is Transmit Enable output TXEN.
GPIOV33_2/
COL
A12
I/O/Z
IPD
GPIOV33_1/
TXCLK
A13
I/O/Z
IPD
GPIOV33_0/
TXEN
B13
I/O/Z
IPD
Table 2-20. Standalone GPIOV18 Terminal Functions
SIGNAL
NAME
IPD/
IPU
(2)
TYPE
(1)
DESCRIPTION
NO.
Standalone GPIOV18
GPIO7
C3
I/O/Z
IPD
This pin is standalone and functions as GPIO7.
(1)
(2)
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal
IPD = Internal pulldown, IPU = Internal pullup. (To pull up a signal to the opposite supply rail, a 1-k
resistor should be used.)
Table 2-21. USB Terminal Functions
SIGNAL
NAME
IPD/
IPU
(2)
TYPE
(1)
DESCRIPTION
NO.
USB 2.0
M24XI
M24X0
M24V
DD
M24V
SS
PLLV
DD18
USB_VBUS
F18
F19
F16
F17
M2
J17
I
Crystal input for M24 oscillator (24 MHz for USB)
Crystal output for M24 oscillator
1.8V power supply for M24 oscillator
Ground for M24 oscillator
1.8 Volt power supply for PLLs (system and USB)
5V input that signifies that VBUS is connected
USB operating mode identification pin. For Host mode operation, pull down this
pin to ground (V
) via an external 1.5-k
resistor. For Device mode operation,
pull up this pin to DV
DD33
rail via an external 1.5-k
resistor.
O
S
GND
S
A I/O
USB_ID
J16
A I/O
USB_DP
USB_DM
G19
H19
A I/O
A I/O
USB bi-directional Data Differential signal pair [positive/negative].
Reference current output. This must be connected via a 10 k
±
1% resistor to
USB_V
SSREF
.
Ground for reference current.
Analog 3.3 V power supply for USB phy
Analog ground for USB phy
1.8 V I/O power supply for USB phy
I/O Ground for USB phy
Core Power supply LDO output for USB phy. This must be connected via 1 μF
capacitor to USB_V
SSA1P2LDO
. Do not connect this to other supply pins.
Core Ground for USB phy. This must be connected via 1 μF capacitor to
USB_V
DDA1P2LDO
.
USB_R1
H18
A I/O
USB_V
SSREF
USB_V
DDA3P3
USB_V
SSA3P3
USB_V
DD1P8
USB_V
SS1P8
G16
J19
J18
H17
H16
GND
S
GND
S
GND
USB_V
DDA1P2LDO
G18
S
USB_V
SSA1P2LDO
G17
GND
(1)
(2)
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal
IPD = Internal pulldown, IPU = Internal pullup. (To pull up a signal to the opposite supply rail, a 1-k
resistor should be used.)
Device Overview
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