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M
1
6
C
2 /
9
G
o r
u
p
20.9.2 Example of Circuit Application in Standard Serial I/O Mode
Figure 20.17 shows an example of a circuit application in standard serial I/O mode 1 and Figure 20.18
shows an example of a circuit application in standard serial I/O mode 2. Refer to the user's manual of your
serial programmer to handle pins controlled by the serial programmer.
SCLK input
TxD output
BUSY output
RxD input
Reset input
(1) Controlling pins and external circuits vary with the serial programmer. For more
information, refer to the user's manual included with the serial programmer.
(2) In this example, a selector controls the input voltage applied to CNVss to switch
between single-chip mode and standard serial I/O mode.
(3) In standard serial input/output mode 1, if the user reset signal becomes "L" while
the MCU is communicating with the serial programmer, break the connection
between the user reset signal and the RESET pin using a jumper switch.
NOTE:
1. Set the following, either or both.
- Connect the CE pin to Vcc
- Connect the RP pin to Vss and the P1
Figure 20.17 Circuit Application in Standard Serial I/O Mode 1
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1
1 .
2
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3 .
, 0
2
0
0
7
R
E
J
0
9
B
0
1
0
1
0 -
1
1
2
User reset
singnal
page 358
f o
4
5
8
MCU
SCLK
P8
T
D
X
BUSY
RxD
CNVss
RESET
P8
5
pin to Vcc
6
20. Flash Memory Version
(1)
(CE)
6
(1)
P1
6
(RP)
(1)
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