HD404889_03 Datasheet, PDF (19/197 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Pin Description
HD404889/HD404899/HD404878 Series
Item
Power supply
Test
Reset
Oscillation
Port
Interrupt
Wakeup
Serial interface
Timer
LCD
Pin Number
Symbol
FP-80A
TFP-80C I/O
Function
V_CC
16
GND
12
—
Apply the power supply voltage to this pin.
—
Connect to ground.
TEST
9
Input Not for use by the user application. Connect to
GND potential.
RESET
15
Input Used to reset the MCU.
OSC₁
10
OSC
11
2
Input Internal oscillator input/output pins. Connect a
Output ^{ceramic resonator, crystal resonator, or external}
oscillator circuit.
X1
14
Input Realtime clock oscillator input/output pins.
X2
13
Output ^{Connect a 32.768 kHz crystal. If 32.768 kHz}
crystal oscillation is not used, fix the ×1 pin to V_CC
and leave the ×2 pin open.
D₀–D₁₁
17–28
I/O
I/O pins addressed bit by bit. D₀ to D₃ are large-
current source pins (max. 10 mA), and D₄ to D₁₁
are large-current sink pins (max. 15 mA).
R0₀–R6₃
R7 –R8
0
1
INT₀,INT₁
WU₀–WU₃
29–56, 2–7 I/O I/O pins, addressed in 4-bit units.
17,18
29–32
Input
Input
External interrupt input pins
Input pins used for transition from stop mode to
active mode.
SCK
38
I/O Serial interface clock I/O pin
SI
39
Input Serial interface receive data input pin
SO
39
Output Serial interface transmit data output pin
TOB,TOC
36,37
Output Timer output pins
EVNB,EVND 33,34
Input Event count input pins
V₀–V₃
80–77
COM1–COM4 73–76
—
Output
LCD driver power supply pins. The on-chip power
supply dividing resistor can be disconnected by
software. Power supply conditions are:
V_CC≥V₁≥V₂≥V₃≥GND.
LCD common signal pins
SEG1–SEG32 41–72
Output LCD segment signal pins
Rev.6.00, Sep.08.2003, page 19 of 197