TMS320F2810PBKA datasheet(13/173 Pages) TI

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TMS320F2810, TMS320F2811, TMS320F2812

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SPRS174U – APRIL 2001 – REVISED JULY 2019

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Terminal Configuration and Functions

Table 4-1. Signal Descriptions(1) (continued)

NAME

PIN NO.

I/O/Z(2)

PU/PD(3)

DESCRIPTION

179-BALL

GHH/ZHH

176-PIN

PGF

128-PIN

PBK

XMP/MC

–

Microprocessor/Microcomputer Mode Select.

Switches between microprocessor and

microcomputer mode. When high, Zone 7 is

enabled on the external interface. When low,

Zone 7 is disabled from the external interface,

and on-chip boot ROM may be accessed

instead. This signal is latched into the

XINTCNF2 register on a reset and the user

can modify this bit in software. The state of the

XMP/MC pin is ignored after reset.

XHOLD

159

–

External Hold Request. XHOLD, when active

(low), requests the XINTF to release the

external bus and place all buses and strobes

into a high-impedance state. The XINTF will

release the bus when any current access is

complete and there are no pending accesses

on the XINTF.

XHOLDA

K10

–

O/Z

–

External Hold Acknowledge. XHOLDA is

driven active (low) when the XINTF has

granted a XHOLD request. All XINTF buses

and strobe signals will be in a high-impedance

state. XHOLDA is released when the XHOLD

signal is released. External devices should

only drive the external bus when XHOLDA is

active (low).

XZCS0AND1

–

O/Z

–

XINTF Zone 0 and Zone 1 Chip Select.

XZCS0AND1 is active (low) when an access

to the XINTF Zone 0 or Zone 1 is performed.

XZCS2

P13

–

O/Z

–

XINTF Zone 2 Chip Select. XZCS2 is active

(low) when an access to the XINTF Zone 2 is

performed.

XZCS6AND7

B13

133

–

O/Z

–

XINTF Zone 6 and Zone 7 Chip Select.

XZCS6AND7 is active (low) when an access

to the XINTF Zone 6 or Zone 7 is performed.

XWE

N11

–

O/Z

–

Write Enable. Active-low write strobe. The

write strobe waveform is specified, per zone

basis, by the Lead, Active, and Trail periods in

the XTIMINGx registers.

XRD

–

O/Z

–

Read Enable. Active-low read strobe. The

read strobe waveform is specified, per zone

basis, by the Lead, Active, and Trail periods in

the XTIMINGx registers. NOTE: The XRD and

XWE signals are mutually exclusive.

XR/W

–

O/Z

–

Read Not Write Strobe. Normally held high.

When low, XR/W indicates write cycle is

active; when high, XR/W indicates read cycle

is active.

XREADY

161

–

Ready Signal. Indicates peripheral is ready to

complete the access when asserted to 1.

XREADY can be configured to be a

synchronous or an asynchronous input. See

the timing diagrams for more details.

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