HD404669 Datasheet, PDF (7/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
Pin Description
Pin Number
Item
Symbol
FP-64A, chip I/O Function
Power
V_CC
59
supply
GND
8
–
Applies power voltage
–
Connected to ground
Test
TEST
2
Reset
RESET
5
I
Used for factory testing only: Connect this pin to V_CC
I
Resets the MCU
Oscillator OSC₁
3
I
Input/output pins for the internal oscillator circuit:
Connect them to a ceramic oscillator ,crystal
oscillator or connect OSC₁ to an external oscillator
circuit
OSC₂
4
X1
6
O
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
7
O
Port
D₀–D₅,
D₉–D₁₁
9-17
I/O Input/output pins addressed by individual bits; D₀ to D₃ are
source high-current input/output pins. A maximum 10 mA
current can be supplied to each pin.
D₄, D₅, and D₉ to D₁₁ are sink high-current input/output pins. A
maximum 15 mA current can be supplied to each pin.
Interrupt
Stop clear
D₁₂, D₁₃
R0₀–R4_3,
R6₀–RA₁
RD₀, RD_1, RE₀
INT₀, INT₁,
INT₂–INT₄
STOPC
18, 19
20–57
63, 64, 1
19-23
18
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
SI₁
SO₁
TOC, TOD
37
38
39
35, 34
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
EVND
36
I
Event input pin
DTMF
TONER
61
O
Output pin for DTMF row signals
TONEC
60
O
Output pin for DTMF column signals
VT_ref
62
–
Reference voltage pin for DTMF signals.
Voltage conditions are: V_CC ≥ VT_ref ≥ GND
7