TMS320C6455_15 Datasheet, PDF (31/257 Pages) Texas Instruments – TMS320C6455 Fixed-Point Digital Signal Processor

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SIGNAL
NAME
AEA10/MACSEL1
AEA9/MACSEL0
AEA8/PCI_EEAI
AEA7
AEA6/PCI66
AEA5/MCBSP1_EN
AEA4/
SYSCLKOUT_EN
AEA3
AEA2/CFGGP2
AEA1/CFGGP1
AEA0/CFGGP0
TMS320C6455
SPRS276M – MAY 2005 – REVISED MARCH 2012
Table 2-3. Terminal Functions (continued)
TYPE⁽¹⁾ IPD/IPU⁽²⁾
NO.
DESCRIPTION
M25
M27
P25
N27
U27
U28
T28
T27
T26
U26
O/Z
U25
• 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.
• 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:
IPD
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.
Note: For proper C6455 device operation, the AEA11 pin must be externally
pulled up at device reset with a 1-kΩ resistor. The AEA3 pin must be pulled up
at device reset using a 1-kΩ 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-kΩ
resistor.
Copyright © 2005–2012, Texas Instruments Incorporated
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