DSP56853 datasheet(16/60 Pages) FREESCALE

16 / 60 page

56853 Technical Data, Rev. 6

Freescale Semiconductor

103

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.

104

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.

105

HREQ

HTRQ

GPIOB14

Open Drain

Output

Open Drain

Output

Input/Output

Host Request (HREQ)—When the HI08 is programmed for HRMS=0

functionality (typically used on a single-data-strobe bus), this open

drain output is used by the HI to request service from the host

processor. The HREQ may be connected to an interrupt request pin

of a host processor, a transfer request of a DMA controller, or a

control input of external circuitry.

These pins are disconnected internally.

Transmit Host Request (HTRQ)—This signal is the Transmit Host

Request output when the HI08 is programmed for HRMS=1

functionality and is typically used on a double-data-strobe bus.

Port B GPIO (14)—This pin is a General Purpose I/O (GPIO) pin

when not configured for host port usage.

Table 3-1. 56853 Signal and Package Information for the 128-pin LQFP (Continued)

Pin No.

Signal Name

Type

Description

DSP56853 Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc

DSP56853 Datasheet(HTML) 16 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL