Texas Instruments TMS320C6454 - Manual (Page 53)

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PRODUCT PREVIEW
3.3 Peripheral Selection After Device Reset
TMS320C6454
Fixed-Point Digital Signal Processor
SPRS311A – APRIL 2006 – REVISED DECEMBER 2006
Table 3-2. PCI_EN, PCI66, PCI_EEAI, and HPI_WIDTH Peripheral Selection (HPI and PCI) (continued)
CONFIGURATION PIN SETTING (1) PERIPHERAL FUNCTION SELECTED
PCI66 PCI_EEAI HPI_WIDTH
PCI_EN PIN HPI DATA HPI DATA 32-BIT PCI PCI
AEA6 PIN AEA8 PIN AEA14 PIN
[Y29] LOWER UPPER (66-/33-MHz) AUTO-INIT
[U27] [P25] (1) [R25]
Disabled
1 0 0 X Disabled
(default values)
Enabled
Enabled
(33 MHz)
1 0 1 X Disabled (via External I2C
EEPROM)
The MAC_SEL[1:0] configuration pins (AEA[10:9) control which interface is used by the EMAC/MDIO.
Table 3-3 describes the effect of the MACSEL[1:0] configuration pins.
Table 3-3. MAC_SEL[1:0] Peripheral Selection (EMAC)
MAC_SEL[1:0]/
EMAC/MDIO
AEA[10:9] PINS [M25, M27]
PERIPHERAL FUNCTION SELECTED
CONFIGURATION PIN SETTING
00b 10/100 EMAC/MDIO with MII Interface [default]
01b 10/100 EMAC/MDIO with RMII Interface
10b 10/100/1000 EMAC/MDIO with GMII Interface
11b 10/100/1000 EMAC/MDIO with RGMII Interface (1)
(1) RGMII interface requires a 1.5-/1.8-V I/O supply.
On the C6454 device, peripherals can be in one of several states. These states are listed in Table 3-4 .
Table 3-4. Peripheral States
PERIPHERALS THAT CAN
STATE DESCRIPTION
BE IN THIS STATE
HPI
PCI
Peripheral pin function has been completely disabled through the device McBSP1
Static powerdown
configuration pins. Peripheral is held in reset and clock is turned off. EMAC/MDIO
EMIFA
DDR2 Memory Controller
I2C
Timer 0
Timer 1
GPIO
Peripheral is held in reset and clock is turned off. Default state for all
Disabled EMAC/MDIO
peripherals not in static powerdown mode.
McBSP0
McBSP1
HPI
PCI
I2C
Timer 0
Timer 1
GPIO
MDIO
EMAC/MDIO
Enabled Clock to the peripheral is turned on and the peripheral is taken out of reset.
McBSP0
McBSP1
HPI
PCI
EMIFA
DDR2 Memory Controller
Not a user-programmable state. This is an intermediate state when All peripherals that can be in
Enable in progress
transitioning from an disabled state to an enabled state. an enabled state.
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