TNETV2501INPGF datasheet(47/197 Pages) TI1

47 / 197 page

Functional Overview

December 2002 − Revised November 2008

SPRS206K

Table 3−6. External Bus Selection Register Bit Field Description

BIT NAME

BIT NO.

ACCESS

RESET VALUE

DESCRIPTION

Reserved

15−4

000000000000

Reserved

R/W

Reserved. This reserved bit must be kept as zero during any writes

to XBSR.

Reserved

R/W

Reserved. This reserved bit must be kept as zero during any writes

to XBSR.

Reserved

Parallel/Host Port

Mux Mode

R/W

GPIO6

Parllel/Host Port Mux Mode bit. Determines the mode of the Parallel

Port Mux and the Host Port Mux.

• Parallel/Host Port Mux Mode = 0:

The Parallel Port Mux is configured to support PGPIO. In this

mode, the HPI and EMIF cannot be used.

The Host Port Mux is configured to support PGPIO. In this mode,

the Host Port Mux pins will be routed to PGPIO.

• Parallel/Host Port Mux Mode = 1:

The Parallel Port Mux is configured to support the 32-bit EMIF. In

this mode, the EMIF is enabled and its 20 address, 32 data, and

16 control signals are routed to their corresponding pins on the

Parallel Port Mux.

The Host Port Mux is configured to support the HPI in 8-bit

(multiplexed) mode. In this mode, the HPI is enabled and its eight

data/address and two control signals are routed to their

corresponding pins on the Host Port Mux.

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