参数资料
型号: MC68HC05RC18FN
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 46/126页
文件大小: 1180K
代理商: MC68HC05RC18FN
NON-DISCLOSURE
AGREEMENT
REQUIRED
General Description
General Release Specification
MC68HC05RC18 Rev. 2.1
26
General Description
Freescale Semiconductor
1.5.3.3 External Clock Signal
The external component values required for maximum stability and
reliable starting depend upon the resonator parameters. The load
capacitance values used in the oscillator circuit design should include all
stray layout capacitances. To minimize output distortion, mount the
resonator and capacitors as close as possible to the pins. (See
Figure 1-8. External Clock Source Connections
1.5.4 RESET
This active-low pin is used to reset the MCU to a known startup state by
pulling RESET low. The RESET pin contains an internal Schmitt trigger
as part of its input to improve noise immunity. See Section 5. Resets.
1.5.5 LPRST
The LPRST pin is an active-low pin and is used to put the MCU into low-
power reset mode. In low-power reset mode, the MCU is held in reset
with all processor clocks and crystal oscillator halted. The LPRST pin
contains an internal Schmitt trigger as part of its input to improve noise
immunity. See Section 5. Resets.
1.5.6 IRO
The IRO pin is the high-current source and sink output of the carrier
modulator transmitter subsystem which is suitable for driving IR LED
<
OSC1
OSC2
MCU
EXTERNAL CLOCK
UNCONNECTED
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