upd17240 Renesas Electronics Corporation., upd17240 Datasheet - Page 11

• Manufacturer Part Number: upd17240
• Description: 4-bit Single-chip Microcontrollers For Small General-purpose Infrared Remote Control Transmitters
• Manufacturer: Renesas Electronics Corporation.

1.1
Pin No.
14
15
30
16
17
18
19
20
21
22
23
24
25
26
27
Pin Function List (3/3)
Pin Name
P1A
P1A
P1A
P0A
P0A
P0A
P0A
P0B
P0B
P0B
P0B
P0C
P0C
P0C
P0C
0
1
2
0
1
2
3
0
1
2
3
0
1
2
3
µ PD17240, 17241, 17242, 17243, 17244, 17245, 17246
These pins constitute a 3-bit I/O port that can be set to the input or When key
output mode in 1-bit units.
If this port is set to 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 to the input mode when a key matrix is used, it
functions as a CMOS input port.
Connection of a resistor to this port and whether the resistor is
pull-up or pull-down 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.
These pins are CMOS input pins with a 4-bit pull-up resistor.
They can be used to input the key return signals of a key matrix.
If any one of these pins goes low, the standby status is released.
These pins constitute a 4-bit I/O port that can be set to the input or N-ch
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 to input the key return signals 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 to output the key return signals of a key matrix.
These pins constitute a 4-bit I/O port that can be set to the input or N-ch
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 to input the key return signals 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 to output the key return signals of a key matrix.
If this port is set to the input mode when a key matrix is used, it
functions as a CMOS input port and can be used to input key
return signals. At this time, whether a pull-up/down resistor is
connected to this port and the standby mode release condition
(whether it is released when this pin is high or low) can be
selected in 1-bit units
1. If connection of a resistor is specified and if it is specified that
2. If connection of a resistor is specified and if it is specified that
3. If connection of a resistor is not specified and if it is specified
the standby mode is released when this port goes low
... A pull-up resistor is connected. If a low level is input to
the standby mode is released when this port goes high
... A pull-down resistor is connected. If a high level is input
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 key, the standby mode is released.
to the set key, the standby mode is released.
the set key, the standby mode is released.
Data Sheet U15002EJ1V1DS
Function
Output Format After Reset
matrix is
used: N-ch
open-drain,
when key
matrix is not
used: CMOS
push-pull.
open drain
open drain
–
CMOS input
(when key
matrix is not
used and
no resistor
connected)
CMOS input
with pull-up
resistor
CMOS input
with pull-up
resistor
Low-level
output
11