PD17P246_15 Datasheet, PDF (11/34 Pages) Renesas Technology Corp – PD17P246_15 FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROLLER

µPD17P246
2.1 Normal Operating Mode (3/3)
Pin No.
14
15
30
Symbol
P1A0
P1A1
P1A2
16
P0A0
17
P0A1
18
P0A2
19
P0A3
20
P0B0
21
P0B1
22
P0B2
23
P0B3
24
P0C0
25
P0C1
26
P0C2
27
P0C3
Function
Output Form After Reset
These pins constitute a 3-bit I/O port that can be set in the input or When key
output mode in 1-bit units.
matrix is
If this port is set in the input mode when a key matrix is used, it used: N-ch
functions as a CMOS input port and can be used to input key open-drain,
return signals. At this time, whether a pull-up/down resistor is when key
connected to this port and the standby mode release condition matrix is not
(whether it is released when this pin is high or low) can be
used: CMOS
selected in 1-bit units
push-pull
1. If connection of a resistor is specified and if it is specified that
the standby mode is released when this port goes low
... A pull-up resistor is connected. If a low level is input to
the set pin, the standby mode is released.
2. If connection of a resistor is specified and if it is specified that
the standby mode is released when this port goes high
... A pull-down resistor is connected. If a high level is input
to the set pin, the standby mode is released.
3. If connection of a resistor is not specified and if it is specified
that the standby mode is released when this port goes low
(or high)
... No resistor is connected. If a low (or high) level is input to
the set pin, the standby mode is released.
If this port is set in the output mode when a key matrix is used, it
functions as an N-ch open-drain output port and can be used to
output key matrix signals.
If this port is set in the input mode when a key matrix is not used, it
functions as a CMOS input port.
Connection of a resistor to this port and whether a pull-up or pull-
down resistor is connected to the port can be selected in 1-bit
units.
If this port is set in the output mode when a key matrix is not used,
it functions as a high-current CMOS output port.
CMOS input
(when key
matrix is not
used and
no resistor
connected)
These pins are CMOS input pins with a 4-bit pull-up resistor.
They can be used as the key return input lines of a key matrix.
If any one of these pins goes low, the standby status is released.
–
CMOS input
with pull-up
resistor
These pins constitute a 4-bit I/O port that can be set in the input or
output mode in 1-bit units.
In the input mode, these pins are CMOS input pins with a pull-up
resistor, and can be used as the key return input lines of a key
matrix. The standby status is released when at least one of these
pins goes low.
In the output mode, they serve as N-ch open-drain output pins and
can be used as the output lines of a key matrix.
N-ch
open-drain
These pins constitute a 4-bit I/O port that can be set in the input or
output mode in 4-bit units (group I/O).
In the input mode, these pins are CMOS input pins with a pull-up
resistor, and can be used as the key return input lines of a key
matrix. The standby status is released when at least one of these
pins goes low.
In the output mode, they serve as N-ch open-drain output pins and
can be used as the output lines of a key matrix.
N-ch
open-drain
CMOS input
with pull-up
resistor
Low-level
output
Data Sheet U15215EJ1V0DS
9