MSM6576 Datasheet, PDF (4/12 Pages) OKI electronic componets – Operatable at 0.9 V and 7-level Detector 4-Bit Microcontroller

¡ Semiconductor
MSM6576
PIN DESCRIPTIONS
Symbol
PORT0
(P0.0 to P0.3)
PORT1
(P1.1 to P1.3)
PORT2
(P2.0 to P2.3)
PORT3
(P3.0 to P3.3)
PORT4
(P4.0 to P4.3)
PORT5
(P5.0 to P5.3)
PORT6
(P6.0 to P6.3)
PORT7
(P7.0 to P7.3)
BD
RESET
TEST1
TEST2
TEST3
XT
XTB
V_DD
V_SS1
V_SS2
V_CP
V_CM
V_EE
Type
I/O
Description
4-bit input-output port, I/O switchable, input pull-down resistor/pull-up resistor
switchable, with/without input resistor
I/O 4-bit input-output port, I/O switchable, with/without input pull-down resistor
4-bit input-output port, I/O switchable,
I/O
with/without input pull-down resistor
External interrupt
P2.0 to P2.3
port
I/O 4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O 4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O 4-bit input-output port, I/O switchable, with/without input pull-down resistor
4-bit input-output port, I/O switchable,
I/O
with/without input pull-down resistor
P7.0: Input port, without input resistor
P7.1: Input pin for level detector
I
P7.2: Input pin for comparator
P7.3: Input pin for comparator
O Buzzer output pin
I Reset pin with input pull-down resistor
P6.3: SOUT
P6.2: SCLK
P7.0: SIN
Shared with serial
port
Testing pins with input pull-down resistor
I
Tie to the negative pole of the battery.
I
Connection pins for crystal
O
— 0 V power supply pin
— –1.5 V supply pin (power supply pin for –1.5 V operation)
— –3.0 V supply pin (power supply pin for –3.0 V operation)
— Connection pins for internal potential development capacitor
— Supply pin for internal logic (constant voltage circuit output pin)
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