dsp56854 Freescale Semiconductor, Inc, dsp56854 Datasheet - Page 17

• Manufacturer Part Number: dsp56854
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Pin No.
Table 3-1. 56854 Signal and Package Information for the 128-pin LQFP (Continued)
106
101
99
98
97
20
21
Signal Name
GPIOB15
GPIOG0
GPIOG1
GPIOG2
GPIOG3
HRRQ
HACK
IRQA
IRQB
TIO0
TIO1
TIO2
TIO3
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Open Drain
Output
Type
Input
Input
56854 Technical Data, Rev. 6
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.
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.
Port B GPIO(15)—This pin is a General Purpose I/O (GPIO) pin
when not configured for host port usage.
Timer Input/Outputs (TIO0)—This pin can be independently
configured to be either a timer input source or an output flag.
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.
Timer Input/Outputs (TIO1)—This pin can be independently
configured to be either a timer input source or an output flag.
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.
Timer Input/Outputs (TIO2)—This pin can be independently
configured to be either a timer input source or an output flag.
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.
Timer Input/Outputs (TIO3)—This pin can be independently
configured to be either a timer input source or an output flag.
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.
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.
Description
Introduction
17