
M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
Rev.1.00 Oct 01, 2002 page 30 of 110
REJ03B0134-0100Z
8.5.1 Serial I/O Common Transmission/Recep-
tion mode
By writing “1” to bit 6 of the serial I/O mode register, signals SIN and
SOUT are switched internally to be able to transmit or receive the
serial data.
Figure 8.5.4 shows signals on serial I/O common transmission/re-
ception mode.
Note: When receiving the serial data after writing “FF16” to the serial I/O regis-
ter.
Fig. 8.5.4 Signals on Serial I/O Common Transmission/Reception Mode
S
e
r
i
a
l
I
/
O
s
h
i
f
t
r
e
g
i
s
t
e
r
(
8
)
“
1
”
“
0
”
Clock
S
C
L
K
S
OUT
S
I
S
M
6
SM : Serial I/O mode register
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