dsp56824 Freescale Semiconductor, Inc, dsp56824 Datasheet - Page 13

• Manufacturer Part Number: dsp56824
• Description: 16-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

2.6 GPIO Signals
PB0–
PB7
PB8–
PB14
XCOLF
PB15
Signal
Name
Signal
Name
Table 12. Dedicated General Purpose Input/Output (GPIO) Signals
Signal
Output
Type
Input
Signal
Output
Output
Type
Input
Input
Input
or
or
or
Table 11. Programmable Interrupt GPIO Signals
During
internally
Reset
State
Input
During
Reset
pulled
Input,
State
Input
high
Freescale Semiconductor, Inc.
For More Information On This Product,
Port B GPIO—These eight pins can be programmed to generate an interrupt for
any pin programmed as an input when there is a transition on that pin. Each pin
can individually be configured to recognize a low-to-high or a high-to-low
transition. In addition, these pins are dedicated General Purpose I/O (GPIO) pins
that can individually be programmed as input or output pins.
After reset, the default state is GPIO input.
Port B GPIO—These seven pins are dedicated General Purpose I/O (GPIO)
pins that can individually be programmed as input or output pins.
After reset, the default state is GPIO input.
XCOLF—During reset, the External Crystal Oscillator Low Frequency (XCOLF)
function of this pin is active. PB15/XCOLF is tied to an on-chip pull-up transistor
that is active during reset. When XCOLF is driven low during reset (or tied to a
10 k pull-down resistor), the crystal oscillator amplifier is set to a low
frequency mode. In this low-frequency mode, only oscillator frequencies of 32
kHz and 38.4 kHz are supported. If XCOLF is not driven low during reset (or if a
pull-down resistor is not used), the crystal oscillator amplifier operates in the
Default mode, and oscillator frequencies from 2 MHz to 10 MHz are supported.
If an external clock is provided to the EXTAL pin, 40 MHz is the maximum
frequency allowed. (In this case, do not connect a pull-down resistor or drive
this pin low during reset.)
Port B GPIO—This pin is a dedicated GPIO pin that can individually be
programmed as an input or output pin.
After reset, the default state is GPIO input.
DSP56824 Technical Data
Go to: www.freescale.com
Signal Description
Signal Description
GPIO Signals
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