参数资料
型号: MC68HC705J1ACP
厂商: Freescale Semiconductor
文件页数: 98/162页
文件大小: 0K
描述: IC MCU 4MHZ 1.2K OTP 20-DIP
标准包装: 18
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-DIP(0.300",7.62mm)
包装: 管件
Technical Data
MC68HC705J1A — Rev. 4.0
Memory
Memory
NOTE:
Writing logic 1s to both the ELAT and EPGM bits with a single instruction
sets ELAT and clears EPGM. ELAT must be set first by a separate
instruction.
Bits [7:3] — Reserved
Take these steps to program a byte of EPROM/OTPROM:
1. Apply the programming voltage, VPP, to the IRQ/VPP pin.
2. Set the ELAT bit.
3. Write to any EPROM/OTPROM address.
4. Set the EPGM bit and wait for a time, tEPGM.
5. Clear the ELAT bit.
2.6.3 EPROM Erasing
The erased state of an EPROM bit is logic 0. Erase the EPROM by
exposing it to 15 Ws/cm2 of ultraviolet light with a wave length of
2537 angstroms. Position the ultraviolet light source one inch from the
EPROM. Do not use a shortwave filter.
2.7 Mask Option Register
The mask option register (MOR) is an EPROM/OTPROM byte that
controls these options:
COP watchdog (enable or disable)
External interrupt pin triggering (edge-sensitive only or edge- and
level-sensitive)
Port A external interrupts (enable or disable)
Port pulldown resistors (enable or disable)
STOP instruction (stop mode or halt mode)
Crystal oscillator internal resistor (enable or disable)
EPROM security (enable or disable)
Short oscillator delay (enable or disable)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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