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7542 Group
• Standard serial I/O mode 1
Figure 107 shows the handling example of control pins on the
user system board when the standard serial I/O mode 1 is used.
Refer to the serial programmer manual of your programmer to
handle pins controlled by the programmer.
Connect the user reset circuit to the RESET pin with the shortest possible wiring.
Notes 1:
In the normal microcomputer mode, disconnect a wiring of a serial rewrite circuit,
which is for the flash memory version, from the MCU by a jumper switch.
Connect the CNVss pin to the Vss pin with the shortest possible wiring.
2:
In the normal microcomputer mode, disconnect a wiring of a serial rewrite circuit,
which is for the flash memory version, from the MCU by a jumper switch.
Fig. 107 Handling example of control pins in standard serial I/O mode 1
Rev.3.02
Oct 31, 2006
REJ03B0006-0302
Target board
User reset circuit
Page 88 of 134
To user system circuit
M37542 flash memory version
T
D(P0
)
X
5
S
(P0
)
CLK
6
R
D(P0
)
X
4
BUSY(P0
)
7
(P3
)
2
(P3
)
7
Note 1
RESET
SS Note 2
CNV
V
SS
X
X
IN
OUT
V
CC
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