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7542 Group
• Standard serial I/O mode 2
Figure 112 shows the handling example of control pins on the user
system board when the standard serial I/O mode 2 is used.
Refer to the serial programmer manual of your programmer to
handle pins controlled by the programmer.
Notes 1:
Connect the user reset circuit to the RESET pin with the shortest possible wiring.
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.
2:
Connect the CNVss pin to the Vss pin with the shortest possible wiring.
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. 112 Handling example of control pins in standard serial I/O mode 2
Rev.3.02
Oct 31, 2006
REJ03B0006-0302
Target board
User reset circuit
Page 93 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
RESET
Note 1
CNV
Note 2
SS
V
SS
X
X
IN
OUT
V
CC
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