参数资料
型号: MC68HC705RC17P
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.097 MHz, MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 68/126页
文件大小: 3079K
代理商: MC68HC705RC17P
NON-DISCLOSURE
AGREEMENT
REQUIRED
Resets
General Release Specification
MC68HC705RC17 Rev. 2.0
Resets
5.3 External Reset (RESET)
The RESET pin is one of the two external sources of a reset. This pin is
connected to a Schmitt trigger input gate to provide an upper and lower
threshold voltage separated by a minimum amount of hysteresis. This
external reset occurs whenever the RESET pin is pulled below the lower
threshold and remains in reset until the RESET pin rises above the
upper threshold. This active-low input will generate the RST signal and
reset the CPU and peripherals. Termination of the external RESET input
or the internal COP watchdog reset are the only reset sources that can
alter the operating mode of the MCU.
NOTE:
Activation of the RST signal is generally referred to as reset of the
device, unless otherwise specified.
Figure 5-1. Reset Block Diagram
CPU
LATCH
RESET
COP WATCHDOG
(COPR)
RST
OSC
DATA
ADDRESS
PH2
TO OTHER
PERIPHERALS
S
IRQ
MODE
SELECT
TO IRQ
LOGIC
LATCH
R
POWER-ON RESET
(POR)
VDD
ILLEGAL ADDRESS
(ILLADDR)
ADDRESS
CLOCKED
D
LPRST
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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