Product preview – Texas Instruments TMS320C6454 User Manual
Page 35
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PRODUCT PREVIEW
TMS320C6454
Fixed-Point Digital Signal Processor
SPRS311A – APRIL 2006 – REVISED DECEMBER 2006
Table 2-3. Terminal Functions (continued)
SIGNAL
TYPE
(1)
IPD/IPU
(2)
DESCRIPTION
NAME
NO.
This pin is the EMAC collision sense (MCDL) (I) for MII [default] or GMII.
MCOL
K3
I/O/Z
MACSEL[1:0] dependent.
This pin is either the EMAC transmit enable (MTXEN) (O) for MII [default],
MTXEN/RMTXEN
J5
I/O/Z
RMII, or GMII. MACSEL[1:0] dependent.
MTXD7
N5
MTXD6
M3
MTXD5
L5
EMAC transmit data bus for MII [default], RMII, or GMII.
MTXD4
L3
O/Z
These pins function as EMAC transmit data pins (MTXD[x:0]) (O) for MII, RMII,
MTXD3
K4
or GMII. MACSEL[1:0] dependent.
MTXD2
M4
MTXD1/RMTXD1
L4
MTXD0/RMTXD0
M1
ETHERNET MAC (EMAC) [RGMII]
There are two configuration pins — the MAC_SEL[1:0] (AEA[10:9] pins) that select one of the four interface modes (MII, RMII, GMII, or
RGMII) for the EMAC/MDIO interface. For more detailed information on the EMAC configuration pins, see
, Device Configuration.
RGMII reference clock (O). This 125-MHz reference clock is provided as a
convenience. It can be used as a clock source to a PHY, so that the PHY may
RGREFCLK
C4
O/Z
generate RXC clock to communicate with the EMAC. This clock is stopped
while the device is in reset. This pin is available only when RGMII mode is
selected ( MACSEL[1:0] =11).
RGMII transmit clock (O). This pin is available only when RGMII mode is
RGTXC
D4
O/Z
selected (MACSEL[1:0] =11).
RGTXD3
A2
RGTXD2
C3
RGMII transmit data [3:0] (O). This pin is available only when RGMII mode is
O/Z
selected (MACSEL[1:0] =11).
RGTXD1
B3
RGTXD0
A3
RGMII transmit enable (O). This pin is available only when RGMII mode is
RGTXCTL
D3
O/Z
selected (MACSEL[1:0] =11).
RGMII receive clock (I). This pin is available only when RGMII mode is selected
RGRXC
E3
I
(MACSEL[1:0] =11).
RGRXD3
C1
I
RGRXD2
E4
I
RGMII receive data [3:0] (I). This pin is available only when RGMII mode is
selected (MACSEL[1:0] =11).
RGRXD1
E2
I
RGRXD0
E1
I
RGMII receive control (I). This pin is available only when RGMII mode is
RGRXCTL
C2
I
selected (MACSEL[1:0] =11).
RESERVED FOR TEST
RSV02
V5
RSV03
W3
Reserved. These pins must be connected directly to core supply (CV
DD
) for
proper device operation.
RSV04
N11
RSV05
P11
RSV07
G4
I
Reserved. This pin must be connected directly to 1.5-/1.8-V I/O supply
(DV
DD15
) for proper device operation.
Note: If the EMAC RGMII is not used, these pins can be connected directly to
RSV09
D26
I
ground (V
SS
) .
Reserved. This pin must be connected to ground (V
SS
) via a 200-
Ω
resistor for
proper device operation.
NOTE: If the DDR2 Memory Controller is not used, the V
REFSSTL
, RSV11, and
RSV12 pins can be connected directly to ground (V
SS
) to save power.
RSV11
D24
However, connecting these pins directly to ground will prevent boundary-scan
from functioning on the DDR2 Memory Controller pins. To preserve
boundary-scan functionality on the DDR2 Memory Controller pins, see
.
Device Overview
35