参数资料
型号: MC68HC705J1ACDW
厂商: Freescale Semiconductor
文件页数: 132/162页
文件大小: 0K
描述: IC MCU 4MHZ 1.2K OTP 20-SOIC
标准包装: 38
系列: HC05
核心处理器: HC05
芯体尺寸: 8-位
速度: 4MHz
外围设备: POR,WDT
输入/输出数: 14
程序存储器容量: 1.2KB(1.2K x 8)
程序存储器类型: OTP
RAM 容量: 64 x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-SOIC(0.295",7.50mm 宽)
包装: 管件
Resets and Interrupts
Resets
MC68HC705J1A — Rev. 4.0
Technical Data
Resets and Interrupts
4.3.1 Power-On Reset
A positive transition on the VDD pin generates a power-on reset.
NOTE:
The power-on reset is strictly for power-up conditions and cannot be
used to detect drops in power supply voltage.
A 4064-tcyc (internal clock cycle) delay after the oscillator becomes
active allows the clock generator to stabilize. If any reset source is active
at the end of this delay, the MCU remains in the reset condition until all
reset sources are inactive.
Figure 4-2. Power-On Reset Timing
OSCILLATOR STABILIZATION DELAY
VDD
OSC1 PIN
INTERNAL
CLOCK
INTERNAL
ADDRESS BUS
Notes:
INTERNAL
DATA BUS
1. Power-on reset threshold is typically between 1 V and 2 V.
2. Internal clock, internal address bus, and internal data bus are not available externally.
$07FE
$07FF
NEW PCH
NEW PCL
(NOTE 1)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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