DSP56857 datasheet(13/53 Pages) FREESCALE

13 / 53 page

Introduction

56857 Technical Data, Rev. 6

Freescale Semiconductor

HA1

GPIOB9

Input

Input/Output

Host Address (HA1)—This input provides the address selection for HI

registers.

This pin is disconnected internally.

Port B GPIO (9)—This pin is a General Purpose I/O (GPIO) pin when not

configured for host port usage.

HA2

GPIOB10

Input

Input/Output

Host Address (HA2)—This input provides the address selection for HI

registers.

This pin is disconnected internally.

Port B GPIO (10)—This pin is a General Purpose I/O (GPIO) pin when

not configured for host port usage.

HRWB

HRD

GPIOB11

Input

Input/Output

Host Read/Write (HRWB)—When the HI08 is programmed to interface

to a single-data-strobe host bus and the HI function is selected, this

signal is the Read/Write input.

These pins are disconnected internally.

Host Read Data (HRD)—This signal is the Read Data input when the

HI08 is programmed to interface to a double-data-strobe host bus and the

HI function is selected.

Port B GPIO (11) —This pin is a General Purpose I/O (GPIO) pin when

not configured for host port usage.

HDS

HWR

GPIOB12

Input

Input/Output

Host Data Strobe (HDS)—When the HI08 is programmed to interface to

a single-data-strobe host bus and the HI function is selected, this input

enables a data transfer on the HI when HCS is asserted.

These pins are disconnected internally.

Host Write Enable (HWR)—This signal is the Write Data input when the

HI08 is programmed to interface to a double-data-strobe host bus and the

HI function is selected.

Port B GPIO (12)—This pin is a General Purpose I/O (GPIO) pin when

not configured for host port usage.

HCS

GPIOB13

Input

Input/Output

Host Chip Select (HCS)—This input is the chip select input for the Host

Interface.

These pins are disconnected internally.

Port B GPIO (13)—This pin is a General Purpose I/O (GPIO) pin when

not configured for host port usage.

Table 3-1 56857 Signal and Package Information for the 100-pin LQFP (Continued)

Pin No.

Signal Name

Type

Description

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