参数资料
型号: MC68HC705J1ACP
厂商: Freescale Semiconductor
文件页数: 95/162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
2.6 EPROM/OTPROM
A microcontroller unit (MCU) with a quartz window has 1240 bytes of
erasable, programmable ROM (EPROM). The quartz window allows
EPROM erasure with ultraviolet light.
NOTE:
Keep the quartz window covered with an opaque material except when
programming the MCU. Ambient light can affect MCU operation.
In an MCU without the quartz window, the EPROM cannot be erased
and serves as 1240 bytes of one-time programmable ROM (OTPROM).
These addresses are user EPROM/OTPROM locations:
$0300–$07CF
$07F8–$07FF, used for user-defined interrupt and reset vectors
The computer operating properly (COP) register (COPR) is an
EPROM/OTPROM location at address $07F0.
The mask option register (MOR) is an EPROM/OTPROM location at
address $07F1.
2.6.1 EPROM/OTPROM Programming
The two ways to program the EPROM/OTPROM are:
1. Manipulating the control bits in the EPROM programming register
to program the EPROM/OTPROM on a byte-by-byte basis
2. Programming the EPROM/OTPROM with the M68HC705J
in-circuit simulator (M68HC705JICS) available from Freescale
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For More Information On This Product,
Go to: www.freescale.com
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