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參數資料
| 型號： | MC68HC05J1 |
| 廠商： | Motorola, Inc. |
| 英文描述： | HCMOS MICROCONTROLLER UNIT |
| 中文描述： | HCMOS微控制器 |
| 文件頁數： | 40/82頁 |
| 文件大?。?/td> | 327K |
| 代理商： | MC68HC05J1 |
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MOTOROLA
6-4
MEMORY
MC68HC705J2
Rev. 2
1
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6.1.3 EPROM
Two Kbytes of user EPROM for storage of program instructions and fixed data are
located at addresses $0700–$0EFF. The eight addresses from $0FF8–$0FFF are
EPROM locations reserved for interrupt vectors and reset vectors. Eight additional
EPROM bytes are located at $0FF0–$0FF8. There are two ways to write data to
the EPROM:
The EPROM programming register contains the control bits for programming
the EPROM on a byte-by-byte basis.
The bootloader ROM contains routines to download the contents of an
external memory device to the on-chip EPROM.
6.1.3.1 EPROM Programming
The EPROM programming register, shown in
Figure 6-3
, contains the control bits
for programming the EPROM.
Figure 6-3. EPROM Programming Register (PROG)
LATCH — EPROM Bus Latch
This read/write bit causes address and data buses to be latched for EPROM
programming. Clearing the LATCH bit automatically clears the EPGM bit.
1 = Address and data buses configured for EPROM programming
0 = Address and data buses configured for normal operation
EPGM — EPROM Programming
This read/write bit applies programming power to the EPROM. To write the
EPGM bit, the LATCH bit must already be set.
1 = EPROM programming power switched on
0 = EPROM programming power switched off
Bits 7–3 and 1 — Not used; always read as zeros.
PROG —
EPROM Programming Register
$001C
Bit 7
0
0
6
0
0
5
0
0
4
0
0
3
0
0
2
1
0
0
Bit 0
EPGM
0
LATCH
0
RESET
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| MC68HC705J2CP | HCMOS MICROCONTROLLER UNIT |
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| MC68HC705J2P | HCMOS MICROCONTROLLER UNIT |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC05J1A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1ACDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1ACP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1ADW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1AP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
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