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HC705RC16GRS/D 데이터시트(PDF) 28 Page - NXP Semiconductors

부품명 HC705RC16GRS/D
상세설명  The MC68HC705RC16 is a low-cost addition to the M68HC05 Family of microcontrollers (MCUs) and is suitable for remote control applications.
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
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HC705RC16GRS/D 데이터시트(HTML) 28 Page - NXP Semiconductors

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Memory
General Release Specification
MC68HC705RC16 — Rev. 3.0
Memory
2.3.1 EPROM
The user EPROM consists of 15,936 bytes of EPROM from $0180 to
$3FAF and 14 bytes of user vectors from $3FF2 to $3FFF.
The bootloader ROM and vectors are located from $3FB0 to $3FEF.
Ten of the user vectors, $3FF6 thorough $3FFF, are dedicated to reset
and interrupt vectors. The four remaining locations, $3FF2–$3FF5 are
general-purpose user EPROM locations. The mask option registers
(MOR1 and MOR2) are located at $3FF0 and $3FF1.
2.3.2 EPROM Security
The MC68HC705RC16 contains special circuitry to prevent accessing
the EPROM in nonuser mode. Emulation is not affected by security.
Security is controlled by a security bit in the MOR1 register. The security
bit is intended to be programmed while the code is being programmed..
When set, this will inhibit reading of the EPROM in all modes other than
user mode.1
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
$001A
Reserved
R
RRRRRRR
$001B
Reserved
R
RRRRRRR
$001C
Reserved
R
RRRRRRR
$001D
Reserved
R
RRRRRRR
$001E
Reserved
R
RRRRRRR
$001F
Reserved
R
RRRRRRR
R
= Reserved
Addr.
Register
Bit 7
6
5
4
3
2
1
Bit 0
Figure 2-2. I/O Registers (Continued)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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