DSP56854E View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
Manufacturer
DSP56854E Datasheet PDF : 60 Pages
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Introduction
Table 3-1. 56854 Signal and Package Information for the 128-pin LQFP (Continued)
Pin No.
Signal Name
Type
Description
106
HACK
Input
Host Acknowledge (HACK)—When the HI08 is programmed for
HRMS=0 functionality (typically used on a single-data-strobe bus),
this input has two functions: (1) provide a Host Acknowledge signal
for DMA transfers or (2) to control handshaking and provide a Host
Interrupt Acknowledge compatible with the MC68000 family
processors.
These pins are disconnected internally.
HRRQ
Open Drain
Output
Receive Host Request (HRRQ)—This signal is the Receive Host
Request output when the HI08 is programmed for HRMS=1
functionality and is typically used on a double-data-strobe bus.
GPIOB15
Input/Output
Port B GPIO(15)—This pin is a General Purpose I/O (GPIO) pin
when not configured for host port usage.
101
TIO0
Input/Output Timer Input/Outputs (TIO0)—This pin can be independently
configured to be either a timer input source or an output flag.
GPIOG0
Input/Output
Port G GPIO (0)—This pin is a General Purpose I/O (GPIO) pin that
can individually be programmed as an input or output pin.
99
TIO1
Input/Output Timer Input/Outputs (TIO1)—This pin can be independently
configured to be either a timer input source or an output flag.
GPIOG1
Input/Output
Port G GPIO (1)—This pin is a General Purpose I/O (GPIO) pin that
can individually be programmed as an input or output pin.
98
TIO2
Input/Output Timer Input/Outputs (TIO2)—This pin can be independently
configured to be either a timer input source or an output flag.
GPIOG2
Input/Output
Port G GPIO (2)—This pin is a General Purpose I/O (GPIO) pin that
can individually be programmed as an input or output pin.
97
TIO3
Input/Output Timer Input/Outputs (TIO3)—This pin can be independently
configured to be either a timer input source or an output flag.
GPIOG3
Input/Output
Port G GPIO (3)—This pin is a General Purpose I/O (GPIO) pin that
can individually be programmed as an input or output pin.
20
IRQA
21
IRQB
Input
External Interrupt Request A and B—The IRQA and IRQB inputs
are asynchronous external interrupt requests that indicate that an
external device is requesting service. A Schmitt trigger input is used
for noise immunity. They can be programmed to be level-sensitive
or negative-edge- triggered. If level-sensitive triggering is selected,
an external pull-up resistor is required for Wired-OR operation.
56854 Technical Data, Rev. 6
Freescale Semiconductor
17
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