E202075_HD404889 Datasheet, PDF (19/202 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
Symbol
V_CC
GND
TEST
RESET
OSC₁
OSC₂
X1
X2
Pin Number
FP-80A
TFP-80C
16
12
9
15
10
11
14
13
I/O
—
—
Input
Input
Input
Output
Input
Output
Function
Apply the power supply voltage to this pin.
Connect to ground.
Not for use by the user application. Connect to GND
potential.
Used to reset the MCU.
Internal oscillator input/output pins. Connect a ceramic
resonator, crystal resonator, or external
oscillator circuit.
Realtime clock oscillator input/output pins. Connect a
32.768 kHz crystal. If 32.768 kHz
crystal oscillation is not used, fix the ×1 pin to VCC and
leave the ×2 pin open.
Port
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).
Interrupt
Wakeup
R0₀–R6₃
R7₀–R8₁
INT₀,INT₁
WU₀–WU₃
29–56, 2–7
17,18
29–32
I/O
Input
Input
I/O pins, addressed in 4-bit units.
External interrupt input pins
Input pins used for transition from stop mode to active
mode.
Serial interface
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
Timer
TOB,TOC
36,37
Output Timer output pins
EVNB,EVND 33,34
Input Event count input pins
LCD
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
A/D converter^*1
AV_CC
1
AV_SS
8
—
A/D converter power supply pin. Connect as close as
possible to the V_CC pin so as to be at the same potential
as V_CC.
—
Ground pin for AV_CC. Connect as close as possible to
the GND pin so as to be at the same potential as GND.
AN₀–AN₅
2–7
Buzzer output
BUZZ
35
Input
Output
A/D converter analog input pins
Timer overflow toggle output or divided system clock
output pin
Other
NC
1, 8^*2
—
Connect to ground potential.
Notes: 1. Applies to HD404889 and HD404899 series.
2. Applies to HD404878 series.
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