HD404639R Datasheet, PDF (6/135 Pages) Renesas Technology Corp – 4-Bit Single-Chip Microcomputer

HD404639R Series
Pin Description
Item
Symbol
Pin Number I/O Function
Power
supply
V_CC
GND
79
— Applies power voltage
12
— Connected to ground
Test
TEST
6
Reset
RESET
9
I Used for factory testing only: Connect this pin to V_CC
I Resets the MCU
Oscillator OSC₁
7
I Input/output pins for the internal oscillator circuit:
Connect them to a ceramic oscillator, crystal, or connect
OSC₁ to an external oscillator circuit
OSC₂
8
O
X1
10
I Used for a 32.768-kHz crystal for clock purposes. If not to
be used, fix the X1 pin to V_CC and leave the X2 pin open.
X2
11
O
Port
D₀–D ₁₁
13–24
I/O Input/output pins addressed by individual bits; pins D₄–
D₁₁ are high-current sink pins that can each supply up to
15 mA, D₀–D₃ are high-current source pins that can each
supply up to 10 mA
Interrupt
Stop clear
D₁₂, D₁₃
R0₀–RC₀
RD₀–RD₃,RE₀
INT₀, INT₁,
INT₂–INT₄
STOPC
25, 26
27–75
1–5
26–30
25
I Input pins addressable by individual bits
I/O Input/output pins addressable in 4-bit units
I Input pins addressable in 4-bit units
I Input pins for external interrupts
I Input pin for transition from stop mode to active mode
Serial
interface
Timer
SCK₁, SCK₂
44, 48
SI₁, SI₂
45, 49
SO₁, SO₂
46, 50
TOB, TOC, TOD 39–41
I/O Serial interface clock input/output pin
I Serial interface receive data input pin
O Serial interface transmit data output pin
O Timer output pins
EVNB, EVND 42, 43
I Event count input pins
DTMF
TONER
78
O Output pin for DTMF row signals
TONEC
77
O Output pin for DTMF column signals.
VT _ref
80
Voltage
COMP₀–COMP₃ 1–4
comparator
— Reference voltage pin for DTMF signals.
Voltage conditions being V_CC ≥ VT_ref ≥ GND
I Analog input pins for voltage comparator
VC _ref
5
— Reference voltage pin for inputting the threshold voltage
of the analog input pin.
Division SEL
rate
76
I Input pin for selecting system clock division rate after
RESET input or after stop mode cancellation.
1/4 division rate: Connect it to V_CC 1/32 division rate:
Connect it to GND
4