参数资料
型号: MC68HSR705J1AP
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, MICROCONTROLLER, PDIP20
封装: PLASTIC, DIP-20
文件页数: 96/162页
文件大小: 3213K
代理商: MC68HSR705J1AP
Memory
EPROM/OTPROM
MC68HC705J1A — Rev. 4.0
Technical Data
Memory
2.6.2 EPROM Programming Register
The EPROM programming register (EPROG) contains the control bits
for programming the EPROM/OTPROM.
ELAT — EPROM Bus Latch Bit
This read/write bit latches the address and data buses for
EPROM/OTPROM programming. Clearing the ELAT bit automatically
clears the EPGM bit. EPROM/OTPROM data cannot be read while
the ELAT bit is set. Reset clears the ELAT bit.
1 = Address and data buses configured for EPROM/OTPROM
programming the EPROM
0 = Address and data buses configured for normal operation
MPGM — MOR Programming Bit
This read/write bit applies programming power from the IRQ/VPP pin
to the mask option register. Reset clears MPGM.
1 = Programming voltage applied to MOR
0 = Programming voltage not applied to MOR
EPGM — EPROM Programming Bit
This read/write bit applies the voltage from the IRQ/VPP pin to the
EPROM. To write the EPGM bit, the ELAT bit must be set already.
Reset clears EPGM.
1 = Programming voltage (IRQ/VPP pin) applied to EPROM
0 = Programming voltage (IRQ/VPP pin) not applied to EPROM
Address:
$0018
Bit 7
6
54321
Bit 0
Read:
0
ELAT
MPGM
EPGM
Write:
RRRR
Reset:
00
000000
= Unimplemented
R = Reserved
Figure 2-3. EPROM Programming Register (EPROG)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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