
A96G140/A96G148/A96A148 User’s manual
20 Development tools
269
To application circuit
P01/DSCL(I)
P00/DSDA(I/O)
R1 (2k
~ 5k
)
To application circuit
R2 (2k
~ 5k
)
VDD
VSS
E-PGM+ , E-GANG4 , E-GANG6
VDD VSS DSCL DSDA
MCU
Four-wire Interface
NOTES
:
1.
In on-board programming mode, very high-speed signal will be provided to pin DSCL and DSDA. And
it will cause some damages to the application circuits connected to DSCL or DSDA port if the
application circuit is designed as high-speed response such as relay control circuit. If possible, the I/O
configuration of DSDA, DSCL pins had better be set to input mode.
2.
The value of R1 and R2 is recommended value. It varies with circuit of system.
Figure 147. PCB Design Guide for On-Board Programming
2
V
DD
1
3
4
5
6
7
8 10
9
VSS
DS
CL
DS
DA