- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69026 > MC68HC05J3CP (MOTOROLA INC) 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 PDF資料下載
參數(shù)資料
| 型號： | MC68HC05J3CP |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 10/74頁 |
| 文件大?。?/td> | 814K |
| 代理商： | MC68HC05J3CP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁
MOTOROLA
2-2
MC68HC05J3
MODES OF OPERATION AND PIN DESCRIPTIONS
2
2.1.2
RAM bootloader mode
The RAM bootloader mode for the MC68HC05J3 allows the user to run a program in RAM. To
make use of this feature a circuit board should be constructed as shown in Figure 2-1. It is then
possible, by correctly conguring TCAP and PA3, to load a user program into RAM and then to
execute it.
The RAM bootloader is selected when the device is put into bootloader mode with TCAP held high.
If PA3 is low, the program counter is set to $0081 and a previously loaded RAM program can be
executed. If PA3 is high at reset a program is serially loaded from PA0 into the RAM and executed
from $0081, once the last byte has been received.
The rst byte to be loaded is the count byte which must contain the total number of bytes to be
transferred, including the count byte itself. Therefore, for a program length of $30, the count should
equal $31. The maximum program size including the count byte is 124 bytes ($7C), since four
bytes must be left for the stack during download.
Figure 2-1 RAM bootloader circuit
PA0
TCAP
PA3
IRQ
OSC1
OSC2
VDD
RESET
VSS
1.8
VDD
RXD
4.0MHz
VDD
100nF
PA3
Function
0
Jump to RAM ($0081)
1
Load RAM & execute ($0081)
MC68HC05J3
All resistors are 10 k
unless otherwise specied
4.7K
100K
20pF
10M
TPG
15
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC05J3CDW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
| MC68HC05J3P | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| MC68HC05J3DW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
| MC68HC05J3CP | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| MC68HC05J3DW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05J3DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J3P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J5A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
| MC68HC05J5ADW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
| MC68HC05J5AJDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
發(fā)布緊急采購，3分鐘左右您將得到回復。