MB89202 Series
6
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PIN DESCRIPTION
(Continued)
Pin No.
Pin name
Circuit
type
Function
SH-DIP32*
1
8
SSOP34*
2
8
X0
A
Pins for connecting the crystal for the main clock. To use an external
clock, input the signal to X0 and leave X1 open.
9
9
X1
5, 6
5, 6
P60, P61
H / E
General-purpose CMOS input port for MB89F202.
General-puspose CMOS I/O port for MB89202/MB89V201.
7
7
RST
C
Reset I/O pin.
This pin serves as an N-channel open-drain reset output with pull-up
resistor (not available for MB89F202) and a reset input as well. The
reset is a hysteresis input.
It outputs the “L” signal in response to an internal reset request. Also,
it initializes the internal circuit upon input of the “L” signal.
28 to 31 30 to 33
P00/INT20/
AN4
to P03/
INT23/AN7
G
General-purpose CMOS I/O ports.
These pins also serve as an input (wake-up input) of external interrupt
2 or as an 10-bit A/D converter analog input. The input of external in-
terrupt 2 is a hysteresis input.
1 to 4
1 to 4
P04/INT24
to
P07/INT27
D
General-purpose CMOS I/O ports.
These pins also serve as an input (wake-up input) of external interrupt
2. The input of external interrupt 2 is a hysteresis input.
19
20
P30/UCK/
SCK
B
General-purpose CMOS I/O ports.
This pin also serves as the clock I/O pin for the UART or 8-bit serial
I/O. The resource is a hysteresis input.
18
19
P31/UO/SO
E
General-purpose CMOS I/O ports.
This pin also serves as the data output pin for the UART or 8-bit serial
I/O.
17
18
P32/UI/SI
B
General-purpose CMOS I/O ports.
This pin also serves as the data input pin for the UART or 8-bit serial
I/O. The resource is a hysteresis input.
15
15
P33/EC
B
General-purpose CMOS I/O ports.
This pin also serves as the external clock input pin for the 8/16-bit cap-
ture timer/counter. The resource is a hysteresis input.
14
14
P34/TO/
INT10
B
General-purpose CMOS I/O ports.
This pin also serves as the output pin for the 8/16-bit capture timer/
counter or as the input pin for external interrupt 1. The resource is a
hysteresis input.
13, 12
13, 12
P35/INT11,
P36/INT12
B
General-purpose CMOS I/O ports.
These pins also serve as the input pin for external interrupt 1. The re-
source is a hysteresis input.
11
11
P37/BZ/
PPG
E
General-purpose CMOS I/O ports.
This pin also serves as the buzzer output pin or the 12-bit PPG output.
20
21
P50/PWM
E
General-purpose CMOS I/O ports.
This pin also serves as the 8-bit PWM timer output pin.