
MB90M405 Series
DS07-13718-3E
7
(Continued)
Pin No.
Pin Name
Circuit
Type
State/
Function at
Reset
Description
QFP-100
58
P86
E
Port input
(Hi-z)
I/O port
SC1
Serial clock I/O pin for UART ch.1
Effective when serial clock output for UART ch.1
enabled
59
P87
I/O port
SO1
Serial data output pin for UART ch.1
Effective when serial data output for UART ch.1 enabled
60
P90
G
I/O port (however, Nch open drain)
SDA
I2C interface data I/O pin. This function is effective when
I2C interface operation is enabled. While the I2C inter-
face is operating, set the port to input (DDR9 : bit 8
= 0) .
SO3
Serial data output pin for serial I/O ch.3
Effective when serial data output for serial I/O ch.3 en-
abled
61
P91
G
I/O port (however, Nch open drain)
SCL
I2C interface clock I/O pin. This function is effective
when I2C interface operation is enabled. While the I2C
interface is operating, set the port to input (DDR9 :
bit 9
= 0) .
SC3
Serial clock I/O pin for serial I/O ch.3
Effective when serial clock output for serial I/O ch.3 en-
abled
64
PA0
F
Analog input
I/O port
AN0
Ch.0 of A/D converter analog input pin
Effective when analog input setting enabled (set with
ADER)
TMCK
Watch clock output pin. Effective when output enabled.
Note that this is not effective when analog input enabled
via ADER.
65 to 74
PA1 to PB2
I/O port
AN1 to AN10
Ch.1 to ch.10 of A/D converter analog input pin
Effective when analog input setting enabled (set with
ADER)
75
PB3
I/O port
AN11
Ch.11 of A/D converter analog input pin
Effective when analog input setting enabled (set with
ADER)
SI2
Serial data input pin for serial I/O ch.2
During input operation by serial I/O ch.2, pin is used
continuously, so do not use as a different pin