TMS320DM643 datasheet(49/160 Pages) TI

49 / 160 page

www.ti.com

Device Configurations

3.1

Configurations at Reset

3.1.1

Peripheral Selection at Device Reset

TMS320DM643

Video/Imaging Fixed-Point Digital Signal Processor

SPRS269A – FEBRUARY 2005 – REVISED APRIL 2005

On the DM643 device, bootmode and certain device configurations/peripheral selections are determined at

device reset, while other device configurations/peripheral selections are software-configurable via the

peripheral configurations register (PERCFG) [address location 0x01B3F000] after device reset.

For proper DM643 device operation, the following external pins must be configured correctly:

• The GP0[0] (pin M5) must remain low, do not oppose the internal pulldown (IPD).

• The RSV09 (pin E2) at device reset must be pulled down via a 10-kΩ resistor.

Some DM643 peripherals share the same pins (internally muxed) and are mutually exclusive (i.e., HPI,

EMAC, and MDIO). Other DM643 peripherals (i.e., the Timers, I2C0, GP0, McBSP0, and VP2), are

always available.

• HPI, EMAC, and MDIO peripherals

The MAC_EN pin is latched at reset and determines specific peripheral selection, summarized in

Table 3-1. For further clarification of the HPI vs. EMAC configuration, see Table 3-2.

Table 3-1. HD5, and MAC_EN Peripheral Selection (HPI, EMAC, and MDIO)

PERIPHERAL SELECTION

PERIPHERALS SELECTED

HD5

MAC_EN

HPI Data

EMAC and MDIO

Pin [Y1]

Pin [C5]

Lower

Upper

√

Hi-Z

Disabled

√

Hi-Z

√

Disabled

√

• The HPI peripheral is enabled and based on the HD5 and MAC_EN pin configuration at reset, HPI16

mode or EMAC and MDIO can be selected.

• The MAC_EN pin, in combination with the HD5 pin, controls the selection of the EMAC and MDIO

peripherals (for more details, see Table 3-2).

Table 3-2. HPI vs. EMAC Peripheral Pin Selection

CONFIGURATION SELECTION

PERIPHERALS SELECTED

GP0[0] (Pin [M5])(1)

HD5 (Pin [Y1])

MAC_EN (Pin [C5])

HD[15:0]

HD[31:16]

HPI16

Hi-Z

HPI16

used for EMAC

HPI32 (HD[31:0])

Hi-Z

used for EMAC

(1) Invalid configuration. The GP0[0] pin must remain low during

device reset.

Device Configurations

TMS320DM643 Datasheet(PDF) 49 Page - Texas Instruments

TMS320DM643 Datasheet(HTML) 49 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL