![](http://datasheet.mmic.net.cn/330000/MB90P234_datasheet_16438148/MB90P234_9.png)
9
MB90230 Series
(Continued)
Pin no.
Pin name
Circuit
type
C
Function
49
MD2
Mode pin
This pin must be fixed to V
SS
.
Hardware standby input pin
General-purpose I/O port
Output compare output pins
These pins function when enabled by the control status register.
External interrupt request inputs 2 and 3.
Since these pins serve for interrupt request as required when external
interrupt is enabled, other outputs must be off unless used
intentionally.
General-purpose I/O port
This pin is always enabled.
Output compare output pins
These pins function when enabled by the control status register.
General-purpose I/O port
This port is always enabled.
Input capture edge input pins
These pins function when enabled by the control status register.
General-purpose I/O port
This port is always enabled.
Input capture edge input pin
This pin functions when enabled by the control status register.
Prescaler output pin
This pin functions when enabled by the control status register.
General-purpose I/O port
This port is always enabled.
The port serves as an open-drain output depending on the open-drain
setting register.
Serial data input pin for the UART
This pin functions when enabled by the control status register.
General-purpose I/O port
This port is always enabled.
The port serves as an open-drain output depending on the open-drain
setting register.
Serial data output pin for the UART
This pin functions when enabled by the control status register.
General-purpose I/O port
This port is always enabled.
The port serves as an open-drain output depending on the open-drain
setting register.
UART clock output pin
This pin functions when enabled by the control status register.
50
HST
P82, P83
OUT0,
OUT1
INT2,
INT3
D
L*
2
51, 52
53 to 56
P84 to P87
E
OUT2 to OUT5
57 to 59
P90 to P92
L*
1
IN0 to IN2
60
P93
L*
1
IN3
CKOT
61
P94
I
SIN0
62
P95
H
SOT0
63
P96
I
SCK0