PD17225_15 Datasheet, PDF (10/86 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

µPD17225, 17226, 17227, 17228
1. PIN FUNCTIONS
1.1 Pin Function List
Pin No.
15 (16)
16 (17)
17 (18)
18 (19)
19 (20)
20 (21)
21 (22)
22 (23)
23 (24)
24 (25)
25 (26)
26 (27)
27 (28)
28 (29)
1 (1)
2 (2)
4 (4)
5 (5)
6 (6)
7 (7)
8 (8)
13 (13)
9 (9)
12 (12)
3 (3)
14 (14)
11 (11)
10 (10)
(15)
(30)
Symbol
P0A0
P0A1
P0A2
P0A3
P0B0
P0B1
P0B2
P0B3
P0C0
P0C1
P0C2
P0C3
P0D0
P0D1
P0D2
P0D3
P0E0
P0E1
P0E2
P0E3
REM
RESET
VDD
GND
INT
WDOUT
XIN
XOUT
IC1
IC2
Function
4-bit CMOS input port with pull-up resistor.
Can be used for key return input of key matrix. When at least
one of these pins goes low, standby function is released.
Output Form On Reset
–
Input
4-bit CMOS input port with pull-up resistor.
Can be used for key return input of key matrix. When at least
–
Input
one of these pins goes low, standby function is released.
4-bit N-ch open-drain output port.
Can be used for key source output of key matrix.
N-ch
open-drain
Low-level
output
4-bit N-ch open-drain output port.
Can be used for key source output of key matrix.
N-ch
open-drain
Low-level
output
4-bit input/output port.
Can be set in inputset in input or output mode in 1-bit units.
In output mode, this port functions as a high current CMOS output
port. In input mode, function as CMOS input and can be specified
to connect pull-up resistor by program.
Outputs transfer signal for infrared remote controller.
Active-high output.
System reset input. CPU can be reset when low-level signal is
input to this pin. While low-level signal is input, oscillator is
stopped. Can be connected to pull-up resistor by mask option.
Power supply
Ground
External interrupt request signal input
Output detecting hang-up and drop in supply voltage. This pin
outputs at low level either when an overflow occurs in the watch-
dog timer, when an overflow/underflow occurs in the stack, or
when the supply voltage drops below a specified level (mask
option). Connect this pin to the RESET pin.
Connects ceramic resonator for system clock oscillation
These pins cannot be used.
Leave open.
CMOS
push-pull
CMOS
push-pull
–
–
–
–
N-ch
open-drain
–
–
Input
Low-level
output
Input
–
–
Input
High-
impedance
Low-level
output at low
voltage
detection
(Oscillation
stops)
–
Remark The number in parenthesis in the Pin No. column indicates the pin numbers of the 30-pin plastic SSOP.
8
Data Sheet U12643EJ2V0DS00