參數(shù)資料
型號: MC68HC05X4CDW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封裝: PLASTIC, SOIC-28
文件頁數(shù): 57/156頁
文件大?。?/td> 3699K
代理商: MC68HC05X4CDW
Modes of Operation and Pin Descriptions
Bootloader modes for the MC68HC05X4 and MC68HC705X4
MC68HC05X4 Rev 1.0
Modes of Operation and Pin Descriptions
NOTE:
‘RAMST’ = the address of the first byte of RAM
=$0050
‘BTROM’ = the address of the first byte of Bootloader ROM = $1F01
Figure 1. MC68HC05X4 bootloader circuit
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
Overrun error
VDD
2 x VDD
MDS/VPP
VDD
RESET
VSS
6
7
8
9
10
11
12
13
22
23
24
25
26
27
28
1
VDD
18 pF
OSC1
OSC2
3
4
15
2
14
1.5 k
5
RXD
TXD
PA3
PA2
Mode
X
0
Test port B
0
1
Execute user code
1
Load user code
Note:
All resistors are 10 k
unless otherwise
specified
For 9600 baud operation, crystal should be 20
MHz (with divide-by-10 option selected)
or 4 MHz (for divide-by-2 option)
MC68HC05X4
VDD
3-modes
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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