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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： 118/126页
文件大小： 3079K
代理商： MC68HC705RC17P
EPROM
Bootloader
MC68HC705RC17 — Rev. 3.0
General Release Specification
EPROM
NON-DISCLOSURE
AGREEMENT
REQUIRED
This counter requires a clock and a reset function. The 12-bit counter
can address up to 4 Kbytes of memory, which means that two port pins
have to be used to address the extra memory space.
NOTE:
The user code must be a one-to-one correspondence with the internal
EPROM addresses.
11.4.2 Programming Register
This register is used to program the EPROM array. Only the LATCH and
EPGM bits are available in user mode. To program a byte of EPROM,
set LATCH, then write data to the desired address, then set EPGM for
tEPGM.
LATCH — EPROM Latch Control
READ: Any time
WRITE: Any time
1 = EPROM address and data bus configured for programming.
Causes address and data bus to be latched when a write to
EPROM is done. EPROM cannot be read if LATCH = 1.
0 = EPROM address and data bus configured for normal reads
EPGM — EPROM Program Control
READ: Any time
WRITE: Any time security is not set
1 = VPP switched on to the EPROM array. If LATCH = 1, EPGM
switches programming power to the EPROM array.
0 = Programming power switched off the EPROM array
Address:
$001E
Bit 7
654321
Bit 0
Read:
RRRRR
LATCH
R
EPGM
Write:
Reset:
00000000
R
= Reserved
Figure 11-2. Programming Register (PROG)
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For More Information On This Product,
Go to: www.freescale.com
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