TMX320C2811PBKA datasheet(39/147 Pages) TI

39 / 147 page

Functional Overview

June 2004

SPRS257

The operation and timing of the external interface, can be controlled by the registers listed in Table 3−6.

Table 3−6. XINTF Configuration and Control Register Mappings

NAME

ADDRESS

SIZE (x16)

DESCRIPTION

XTIMING0

0x00 0B20

XINTF Timing Register, Zone 0 can access as two 16-bit registers or one 32-bit register

XTIMING1

0x00 0B22

XINTF Timing Register, Zone 1 can access as two 16-bit registers or one 32-bit register

XTIMING2

0x00 0B24

XINTF Timing Register, Zone 2 can access as two 16-bit registers or one 32-bit register

XTIMING6

0x00 0B2C

XINTF Timing Register, Zone 6 can access as two 16-bit registers or one 32-bit register

XTIMING7

0x00 0B2E

XINTF Timing Register, Zone 7 can access as two 16-bit registers or one 32-bit register

XINTCNF2

0x00 0B34

XINTF Configuration Register can access as two 16-bit registers or one 32-bit register

XBANK

0x00 0B38

XINTF Bank Control Register

XREVISION

0x00 0B3A

XINTF Revision Register

3.5.1

Timing Registers

XINTF signal timing can be tuned to match specific external device requirements such as setup and hold times

to strobe signals for contention avoidance and maximizing bus efficiency. The timing parameters can be

configured individually for each zone. This allows the programmer to maximize the efficiency of the bus, based

on the type of memory or peripheral that the user needs to access. All XINTF timing values are with respect

to XTIMCLK, which is equal to or one-half of the SYSCLKOUT rate, as shown in Figure 6−25.

For detailed information on the XINTF timing and configuration register bit fields, see the TMS320F28x DSP

External Interface (XINTF) Reference Guide

(literature number SPRU067).

3.5.2

XREVISION Register

The XREVISION register contains a unique number to identify the particular version of XINTF used in the

product. For the 2812, this register will be configured as described in Table 3−7.

Table 3−7. XREVISION Register Bit Definitions

BIT(S)

NAME

TYPE

RESET

DESCRIPTION

15−0

REVISION

0x0004

Current XINTF Revision. For internal use/reference. Test purposes only. Subject to

change.

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