E202075_HD404889 Datasheet, PDF (20/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
HD404868 Series
Item
Power supply
Test
Reset
Oscillation
Symbol
V_CC
GND
TEST
RESET
OSC₁
OSC₂
X1
X2
Pin Number
FP-64A DP-64S
12
19
8
15
5
12
11
18
6
13
7
14
10
17
9
16
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
Interrupt
Wakeup
Serial interface
Timer
LCD
A/D converter
Buzzer output
D₀–D₉
R0₀–R0₂
R1₀–R6₃
R7₀–R7₃
INT₀,INT₁
WU₀–WU₂
SCK
SI
SO
TOB,TOC
EVNB
V₁–V₃
13–22
23–25
26–49
1–4
13,14
23–25
31
32
32
29, 30
26
64–62
COM1–COM4
SEG1–SEG24
AN₀–AN₃
BUZZ
58–61
34–57
1–4
28
20–29
30–32
33–56
8–11
20, 21
30–32
38
39
39
36, 37
33
7–5
1–4
41–64
8–11
35
I/O
I/O pins addressed bit by bit. D₀ to D₃ are large-
current source pins (max. 10 mA), and D₄ to D₉ are
large-current sink pins (max. 15 mA).
I/O
I/O pins, addressed in 4-bit units.
Input External interrupt input pins
Input Input pins used for transition from stop mode to
active mode.
I/O
Serial interface clock I/O pin
Input Serial interface receive data input pin
Output Serial interface transmit data output pin
Output Timer output pins
Input Event count input pins
—
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
Output LCD segment signal pins
Input A/D converter analog input pins
Output Timer overflow toggle output or divided system
clock output pin
18