TMS320VC5506 datasheet(22/119 Pages) TI1

22 / 119 page

Introduction

October 2006 − Revised January 2008

SPRS375C

Table 2−3. Signal Descriptions (Continued)

TERMINAL

NAME

RESET

CONDITION

BK‡

FUNCTION

I/O/Z†

MULTIPLEXED

SIGNAL NAME

PARALLEL BUS (CONTINUED)

C11

O/Z

EMIF SDRAM column strobe. The initial state of this pin depends on the

GPIO0 pin.

GPIO0 = 1:

Output,

EMIF.SDCAS

O/Z

Active-low EMIF SDRAM column strobe. EMIF.SDCAS is selected when

the Parallel Port Mode bit field of the External Bus Selection Register is set

to 00 or 01.

EMIF.SDCAS

GPIO0 = 0:

Reserved

C12

O/Z

EMIF SDRAM write enable. The initial state of this pin depends on the

GPIO0 pin.

GPIO0 = 1:

Output,

EMIF.SDWE

O/Z

EMIF SDRAM write enable. EMIF. SDWE is selected when the Parallel

Port Mode bit field of the External Bus Selection Register is set to 00 or 01.

EMIF.SDWE

GPIO0 = 0:

Reserved

C13

O/Z

SDRAM A10 address line. The initial state of this pin depends on the

GPIO0 pin.

GPIO0 = 1:

EMIF.SDA10

O/Z

SDRAM A10 address line. Address line/autoprecharge disable for

SDRAM memory. Serves as a row address bit (logically equivalent to A12)

during ACTV commands and also disables the autoprecharging function

of SDRAM during read or write operations. EMIF.SDA10 is selected when

the Parallel Port Mode bit field of the External Bus Selection Register is set

to 00 or 01.

GPIO0 = 1:

Output,

EMIF.SDA10

GPIO0 = 0:

Reserved

C14

O/Z

Memory interface clock for SDRAM. The initial state of this pin depends on

the GPIO0 pin.

GPIO0 = 1:

Output,

EMIF.CLKMEM

O/Z

Memory interface clock for SDRAM. EMIF.CLKMEM is selected when the

Parallel Port Mode bit field of the External Bus Selection Register is set to

00 or 01.

EMIF.CLKMEM

GPIO0 = 0:

Reserved

† I = Input, O = Output, S = Supply, Hi-Z = High-impedance

‡ BK = bus keeper (the bus keeper maintains the previous voltage level during reset or while the output pin is not driven), PU = pullup,

PD = pulldown, H = hysteresis input buffer, FS = fail-safe buffer

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