mc68hc05x4dw Freescale Semiconductor, Inc, mc68hc05x4dw Datasheet - Page 15

• Manufacturer Part Number: mc68hc05x4dw
• Description: Xc68hc705x4 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

3-modes
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)
NOTE:
18 pF
V
‘RAMST’ = the address of the first byte of RAM
‘BTROM’ = the address of the first byte of Bootloader ROM = $1F01
18 pF
DD
Figure 1. MC68HC05X4 bootloader circuit
Freescale Semiconductor, Inc.
15
14
3
4
2
For More Information On This Product,
Modes of Operation and Pin Descriptions
VDD
RESET
VSS
OSC1
OSC2
MDS/VPP
2 x V
MC68HC05X4
Go to: www.freescale.com
DD
5
Bootloader modes for the MC68HC05X4 and MC68HC705X4
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
RXD
6
7
8
9
10
11
12
13
22
23
24
25
26
27
28
1
Overrun error
PA3 PA2
X
0
1
Modes of Operation and Pin Descriptions
TXD
0
1
1
V
DD
Execute user code
Load user code
1.5 k
Test port B
MC68HC05X4 Rev 1.0
Mode
V
V
DD
DD
V
DD
=$0050