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TMS320TCI6482
Communications Infrastructure Digital Signal Processor
SPRS246F–APRIL 2005–REVISED MAY 2007
Table 2-3. Terminal Functions (continued)
SIGNAL
NAME
TYPE
(1)
IPD/IPU
(2)
DESCRIPTION
NO.
M25
M27
P25
N27
U27
U28
AEA10/MACSEL1
AEA9/MACSEL0
AEA8/PCI_EEAI
AEA7/VLYNQ_EN
AEA6/PCI66
AEA5/MCBSP1_EN
AEA4/
SYSCLKOUT_EN
AEA3
AEA2/CFGGP2
AEA1/CFGGP1
EMAC/MDIO interface select bits (MACSEL[1:0])
If the EMAC and MDIO peripherals are enabled, AEA12 pin (UTOPIA_EN
= 0) , there are two additional configuration pins — MACSEL[1:0] — to
select the EMAC/MDIO interface.
AEA[10:9]
: MACSEL[1:0] with AEA12 =0.
00 - 10/100 EMAC/MDIO MII Mode Interface (default)
01 - 10/100 EMAC/MDIO RMII Mode Interface
10 - 10/100/1000 EMAC/MDIO GMII Mode Interface
11 - 10/100/1000 with RGMII Mode Interface
[RGMII interface requires a 1.8 V or 1.5 V I/O supply]
When UTOPIA is enabled (AEA12 = 1), if the MACSEL[1:0] bits = 11 then,
the EMAC/MDIO RGMII interface is
still
functional. For more detailed
information, see
Section 3
,
Device Configuration
.
PCI I2C EEPROM Auto-Initialization (PCI_EEAI)
AEA8
: PCI auto-initialization via external I2C EEPROM
If the PCI peripheral is disabled (PCI_EN pin = 0), this pin must
not
be
pulled up.
0 - PCI auto-initialization through I2C EEPROM is disabled (default).
1 - PCI auto-initialization through I2C EEPROM is enabled.
VLYNQ enable bit (VLYNQ_EN)
AEA7
:
0 - VLYNQ disabled; McBSP1 and McBSP0 enabled (default)
This means all multiplexed VLYNQ/McBSP1/GPIO and VLYNQ/McBSP0
pins function as McBSP0 and McBSP1 [if AEA5 pin = 1] and as McBSP0
and GPIO [if AEA5 pin = 0].
1 - VLYNQ enabled; McBSP1, McBSP0, and GPIO disabled
This means all multiplexed VLYNQ/McBSP1/GPIO and VLYNQ/McBSP0
pins now function as VLYNQ.
PCI Frequency Selection (PCI66)
[The PCI peripheral
needs
be enabled (PCI_EN = 1) to use this function]
Selects the PCI operating frequency of 66 MHz or 33 MHz PCI operating
frequency is selected at reset via the pullup/pulldown resistor on the PCI66
pin:
AEA6
:
0 - PCI operates at 33 MHz (default).
1 - PCI operates at 66 MHz.
Note: If the PCI peripheral is disabled (PCI_EN = 0), this pin must
not
be
pulled up.
McBSP1 Enable bit (MCBSP1_EN)
Selects which function is enabled on the McBSP1/GPIO muxed pins
AEA5
:
0 - GPIO pin functions enabled (default).
1 - McBSP1 pin functions enabled.
SYSCLKOUT Enable pin (SYSCLKOUT_EN)
Selects which function is enabled on the SYSCLK4/GP[1] muxed pin
AEA4
:
0 - GP[1] pin function of the SYSCLK4/GP[1] pin enabled (default).
1 - SYSCLK4 pin function of the SYSCLK4/GP[1] pin enabled.
Configuration GPI (CFGGP[2:0]) (
AEA[2:0]
)
These pins are latched during reset and their values are shown in the
DEVSTAT register. These values can be used by software routines for boot
operations.
T28
T27
T26
U26
O/Z
IPD
AEA0/CFGGP0
U25
Note:
For proper TCI6482 device operation, the AEA11 pin must be externally
pulled up at device reset with a 1-k
resistor. The AEA3 pin must be pulled up
at device reset using a 1-k
resistor if power is applied to the SRIO supply
pins. If the SRIO peripheral is not used and the SRIO supply pins are
connected to V
SS
, the AEA3 pin must be pulled down to V
SS
using a 1-k
resistor.
Device Overview
30
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