DM385 datasheet(65/281 Pages) TI

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DM385, DM388

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SPRS821D – MARCH 2013 – REVISED DECEMBER 2013

Table 3-13. Boot Configuration Terminal Functions (continued)

SIGNAL NAME [1]

DESCRIPTION [2]

TYPE [3]

AAR BALL [4]

BTMODE[6]

Boot Mode Selection 6. Reserved Boot Pin. This pin is

multiplexed between ARM Cortex-A8 boot mode and

General-Purpose Memory Controller (GPMC) peripheral

functions. For proper device operation at reset, this pin

should be externally pulled low. After reset, this pin

functions as GPMC multiplexed data/address pin 6

(GPMC_D[6]).

BTMODE[7]

Boot Mode Selection 7. RGMII Internal Delay Selection.

This pin is multiplexed between ARM Cortex-A8 boot

mode and General-Purpose Memory Controller (GPMC)

peripheral functions. At reset, BTMODE[7] is sampled to

determine the RGMII Internal Delay Selection:

•

0 = Internal Delay Enabled

•

1 = Internal Delay Disabled

After reset, this pin functions as GPMC multiplexed

data/address pin 7 (GPMC_D[7]).

BTMODE[8]

Boot Mode Selection 8. Ethernet PHY Configuration. This I

pin is multiplexed between ARM Cortex-A8 boot mode

and General-Purpose Memory Controller (GPMC)

peripheral functions. At reset, when EMAC bootmode is

selected (see Table 4-1), BTMODE[9:8] pins are sampled

to determine the function of the Ethernet PHY Mode

selection:

•

00 = MII (GMII)

•

01 = RMII

•

10 = RGMII

•

11 = Reserved

For more detailed information on the EMAC PHY boot

modes and the EMAC pin functions selected, see Section

4.2.6, Ethernet PHY Mode Selection. After reset, this pin

functions as GPMC multiplexed data/address pin 8

(GPMC_D[8]).

BTMODE[9]

Boot Mode Selection 9. Ethernet PHY Configuration. This I

pin is multiplexed between ARM Cortex-A8 boot mode

and General-Purpose Memory Controller (GPMC)

peripheral functions. At reset, when EMAC bootmode is

selected (see Table 4-1), BTMODE[9:8] pins are sampled

to determine the function of the Ethernet PHY Mode

selection:

•

00 = MII (GMII)

•

01 = RMII

•

10 = RGMII

•

11 = Reserved

For more detailed information on the EMAC PHY boot

modes and the EMAC pin functions selected, see Section

4.2.6, Ethernet PHY Mode Selection. After reset, this pin

functions as GPMC multiplexed data/address pin 9

(GPMC_D[9]).

BTMODE[10]

Boot Mode Selection 10. XIP (NOR) on GPMC

Configuration. This pin is multiplexed between ARM

Cortex-A8 boot mode and General-Purpose Memory

Controller (GPMC) peripheral functions. At reset, when

the XIP (MUX0), XIP (MUX1), XIP w/ WAiT (MUX0) or

XIP w/ WAiT (MUX1) bootmode is selected (see Table 4-

1), BTMODE[10] is sampled to select between GPMC pin

muxing options A or B shown in Table 4-2, XIP (on

GPMC) Boot Options [Muxed or Non-Muxed].

•

0 = GPMC Option A

•

1 = GPMC Option B

After reset, this pin functions as GPMC multiplexed

data/address pin 10 (GPMC_D[10]).

Device Pins

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