參數(shù)資料
型號(hào): MC68HC05PD6
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 71/165頁
文件大小: 841K
代理商: MC68HC05PD6
GENERAL RELEASE SPECIFICATION
July 7, 1997
MOTOROLA
MC68HC05PD6
A-4
REV 1.1
A.5.2 Programming Sequence
The EPROM programming sequence is:
1.
Set the ELAT bit
2.
Write the data to the address to be programmed
3.
Set the PGM bit
4.
Delay for a time tPGMR
5.
Clear the PGM bit
6.
Clear the ELAT bit
The last two steps must be performed with separate CPU writes.
CAUTION
It is important to remember that an external programming voltage
must be applied to the VPP pin while programming, but it should be
equal to VDD during normal operations.
Figure A-2 shows the ow required to successfully program the EPROM.
A.6
EPROM PROGRAMMING SPECIFICATIONS
Table A-2. EPROM Programming Electrical Characteristics
(VDD = 5V ± 10%, VSS = 0 Vdc, TA = 0°C to +70°C, unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
Programming Voltage
IRQ/VPP
VPP
12.5
14.5
V
Programming Current
IRQ/VPP
IPP
mA
Programming Time
per byte
tEPGM
—3—
ms
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