Oki ML63611, User Manual

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ML63611 User’s Manual
Chapter 1 Overview
1 – 16
OPTION B (D): 1.5 V (3.0 V), With regulator
circuit for LCD bias
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
Table 1-3 Pin Description (Basic Functions) (continued)
Classification
Pin
name
Pad No. I/O Function
Reset RESET 126 I
Reset input pin:
2 kHz sampling circuit is equipped.
Holding this pin to
“ H ” level for 1 ms or more puts this
device into a reset state. Then, setting this pin to
“
L
”
level
starts executing an instruction from address 0000H.
A pull-down resistor is internally connected to this pin.
MD 41 Melody output pin (non-inverted output)
Melody
MDB 42
O
Melody output pin (inverted output):
V
DD
or V
SS
is selectable for the pin output voltage when
melody output is turned off.
P0.0 43
P0.1 44
P0.2 45
P0.3 46
I
4-bit input port: Pull-up resistor input, pull-down resistor
input, or high-impedance input is selectable for each bit.
A system reset function is provided that resets the system
when there is a simultaneous key depression of multiple
bits.
PA.0 47
PA.1 48
PA.2 49
PA.3 50
I/O
PB.0 51
PB.1 52
PB.2 53
PB.3 54
I/O
PC.0 55
PC.1 56
PC.2 57
PC.3 58
I/O
PE.0 59
PE.1 60
PE.2 61
Port
PE.3 62
I/O
4-bit input-output ports:
In input mode, pull-up resistor input, pull-down resistor
input, or high-impedance input is selectable for each bit.
In output mode, P-channel open drain output, N-channel
open drain output, CMOS output, or high-impedance
output is selectable for each bit.