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參數(shù)資料
| 型號： | 68HC705BD7 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數(shù)： | 40/85頁 |
| 文件大?。?/td> | 302K |
| 代理商： | 68HC705BD7 |
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MOTOROLA
Page 30
SECTION 6: OPERATING MODES
GENERAL RELEASE SPECIFICATION
MC68HC05BD7 Rev. 2.0
PRELMNARY
Programming Sequence
The EPROM programming is as follows:
- Set the ELAT bit
- Write the data to the address to be programmed
- Set the PGM bit
- Delay for the appropriate amount of time
- Clear the PGM and the ELAT bit
The last item may be done on a single CPU write. It is important to remember that an
external programming voltage must be applied to the VPP pin while programming, but it
should remain between VDD and VSS during normal operation.
Table 6-1: Mode Select Summary
Figure 6-1: Mode Entry Diagram
6.5
EPROM Programming
The 11.5K bytes of USER EPROM is positioned at $1000 through $3DFF with the vector
space from $3FF0 to $3FFF. The erased state of EPROM is read as $FF and EPROM
power is supplied from VPP and VDD pins.
The Programming Control Register (PCR) is provided for the EPROM programming. The
function of EPROM depends on the device operating mode.
In the User Mode, ELAT and PGM bits in the PCR are available for the user read/write and
the remaining test bits become read only bits.
Please contact Motorola for Programming boards availability.
6.5.1
MODE
RESET
IRQ
PB5
USER MODE
SELF CHECK/BOOTSTRAP
L or H
V
TST
X
H
V
TST
= 1.8 x VDD
V
TST
= 1.8 x V
DD
H = V
DD
L = V
SS
H
V
TST
H
H
L
RESET
IRQ
PB5
Single
Chip Mode
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| 68HC705C5 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION(General Release) |
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| 68HC705C8ACP | 制造商: 功能描述: 制造商:Motorola Inc 功能描述: 制造商:undefined 功能描述: |
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