參數(shù)資料
型號: DSP56F801
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: 16-bit Hybrid Controller(16位混合控制器)
中文描述: 16位混合控制器(16位混合控制器)
文件頁數(shù): 8/44頁
文件大?。?/td> 858K
代理商: DSP56F801
8
56F801 Technical Data
2.4 Interrupt and Program Control Signals
2.5 Pulse Width Modulator (PWM) Signals
Table 8. Pulse Width Modulator (PWMA) Signals
1
XTAL
GPIOB3
Output
Input/
Output
Chip-
driven
Input
Crystal Oscillator Output
—This output should be connected to an
8MHz external crystal or ceramic resonator. For more information,
please refer to
Section 3.5
.
This pin can also be connected to an external clock source. For more
information, please refer to
Section 3.5.3
.
Port B GPIO
—This multiplexed pin is a General Purpose I/O (GPIO)
pin that can be programmed as an input or output pin. This I/O can be
utilized when using the on-chip relaxation oscillator so the XTAL pin is
not needed.
Table 7. Interrupt and Program Control Signals
No. of
Pins
Signal
Name
Signal
Type
State
During
Reset
Signal Description
1
IRQA
Input
(Schmitt)
Input
External Interrupt Request A
—The IRQA input is a
synchronized external interrupt request that indicates that an
external device is requesting service. It can be programmed to be
level-sensitive or negative-edge- triggered.
1
RESET
Input
(Schmitt)
Input
Reset
—This input is a direct hardware reset on the processor.
When RESET is asserted low, the hybrid controller is initialized
and placed in the Reset state. A Schmitt trigger input is used for
noise immunity. When the RESET pin is deasserted, the initial
chip operating mode is latched from the EXTBOOT pin. The
internal reset signal will be deasserted synchronous with the
internal clocks, after a fixed number of internal clocks.
To ensure complete hardware reset, RESET and TRST should be
asserted together. The only exception occurs in a debugging
environment when a hardware device reset is required and it is
necessary not to reset the OnCE/JTAG module. In this case,
assert RESET, but do not assert TRST.
No. of
Pins
Signal
Name
Signal
Type
State During
Reset
Signal Description
6
PWMA0-5
Output
Tri-stated
PWMA0-5
— These are six PWMA output pins.
1
FAULTA0
Input
(Schmitt)
Input
FAULTA0
— This fault input pin is used for disabling selected
PWMA outputs in cases where fault conditions originate off-
chip.
Table 6. PLL and Clock (Continued)
No. of
Pins
Signal
Name
Signal
Type
State
During Reset
Signal Description
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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