
9
MB90220 Series
(Continued)
Pin no.
Pin name
Circuit
type
Function
65
PB1
E
General-purpose I/O port
This function is always valid.
SID0
UART0-0 serial data input pin. During UART0-0 input operations, this
input may be used suddenly at any time; therefore, it is necessary to
stop output by other functions on this pin, except when using it for
output deliberately.
66
PB2
E
General-purpose output port
This function is valid when the UART0-0 clock output specification is
“disabled”.
SCK0
UART0-0 clock output pin
The clock output function is valid when the UART0-0 clock output
specification is “enabled”.
UART0-0 external clock input pin. This function is valid when the port
is in input mode and the UART0-0 specification is external clock
mode.
67
PB3
E
General-purpose I/O port
This function is valid when the UART0-1 serial data output
specification is “disabled”.
SOD1
UART0-1 serial data output pin
This function is valid when the UART0-1 serial data output
specification is “enabled”.
68
PB4
E
General-purpose I/O port
This function is always valid.
SID1
UART0-1 serial data input pin
During UART0-1 input operations, this input may be used suddenly at
any time; therefore, it is necessary to stop output by other functions
on this pin, except when using it for output deliberately.
69
PB5
E
General-purpose I/O port.
This function is valid when the UART0-1 clock output specification is
“disabled”.
SCK1
UART0-1 clock output pin. The clock output function is valid when the
UART0-1 clock output specification is “enabled”.
UART0-1 external clock input pin
This function is valid when the port is in input mode and the UART0-1
specification is external clock mode.
70
PB6
E
General-purpose I/O port
This function is valid when the UART0-2 serial data output
specification is “disabled”.
SOD2
UART0-2 serial data output pin
This function is valid when the UART0-2 serial data output
specification is “enabled”.