TMS320F2812 datasheet(42/170 Pages) TI

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XD[15:0]

XA[18:0]

XZCS6

XZCS7

XZCS6AND7

XZCS2

XWE

XR/W

XREADY

XMP/MC

XHOLD

XHOLDA

XCLKOUT

(E)

XRD

XINTF Zone 0

(8K x 16)

XINTF Zone 1

(8K x 16)

XINTF Zone 2

(512K x 16)

XINTF Zone 6

(512K x 16)

XINTF Zone 7

(16K x 16)

(mapped here if MP/

= 1)

0x40 0000

0x3F C000

0x18 0000

0x10 0000

0x00 6000

0x00 4000

0x00 2000

0x00 0000

Data Space

Prog Space

0x08 0000

XZCS0AND1

XZCS0

XZCS1

TMS320F2810, TMS320F2811, TMS320F2812

TMS320C2810, TMS320C2811, TMS320C2812

SPRS174S – APRIL 2001 – REVISED MARCH 2011

www.ti.com

3.5

External Interface, XINTF (2812 Only)

This section gives a top-level view of the external interface (XINTF) that is implemented on the 2812

devices.

The external interface is a non-multiplexed asynchronous bus, similar to the C240x external interface. The

external interface on the 2812 is mapped into five fixed zones shown in Figure 3-5.

Figure 3-5 shows the 2812 XINTF signals.

The mapping of XINTF Zone 7 is dependent on the XMP/MC device input signal and the MP/MC mode bit (bit 8 of

XINTCNF2 register). Zones 0, 1, 2, and 6 are always enabled.

Each zone can be programmed with different wait states, setup and hold timing, and is supported by zone chip

selects (XZCS0AND1, XZCS2, XZCS6AND7), which toggle when an access to a particular zone is performed. These

features enable glueless connection to many external memories and peripherals.

The chip selects for Zone 0 and Zone 1 are ANDed internally together to form one chip select (XZCS0AND1). Any

external memory that is connected to XZCS0AND1 is dually mapped to both Zone 0 and Zone 1.

The chip selects for Zone 6 and Zone 7 are ANDed internally together to form one chip select (XZCS6AND7). Any

external memory that is connected to XZCS6AND7 is dually mapped to both Zone 6 and Zone 7. This means that if

Zone 7 is disabled (via the MP/MC mode), then any external memory is still accessible via Zone 6 address space.

XCLKOUT is also pinned out on the 2810 and 2811.

Figure 3-5. External Interface Block Diagram

Functional Overview

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Product Folder Link(s): TMS320F2810 TMS320F2811 TMS320F2812 TMS320C2810 TMS320C2811 TMS320C2812

TMS320F2812 Datasheet(PDF) 42 Page - Texas Instruments

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