HD404459 Datasheet, PDF (6/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
Pin Description
Pin Number
Item
Symbol
FP-64A
I/O Function
Power supply V_CC
24
GND
8
Power voltage
Ground
Test
Reset
TEST
5
RESET
11
I
Used for factory testing only: Connect this pin to V_CC
I
Resets the MCU
Oscillator OSC₁
6
OSC₂
7
X1
10
I
Input/output pins for the internal oscillator circuit:
Connect them to a ceramic, crystal, or connect only
OSC₁ to an external oscillator circuit
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
9
O
Ports
D₀–D₉
D₁₀, D₁₁
R0₀–R9₃
12–21
22, 23
25–64
I/O Input/output pins addressable by individual bits
I
Input pins addressable by individual bits
I/O Input/output pins addressable in 4-bit units. The R9₃
port is an input-only pin.
Interrupts
Stop clear
RA₀–RA₃
1–4
I
INT₀, INT₁, 25–28, 45–52 I
INT₂, INT₃,
WU₀–WU₇
STOPC
23
I
Input pins addressable in 4-bit units
Input pins for external interrupts
Input pin for transition from stop mode to active mode
Serial
SCK
42
interface
I/O Serial clock input/output pin
SI
43
I
Serial receive data input pin
SO
44
O Serial transmit data output pin
Timers
TOB, TOC, 37–39
O Timer output pins
TOD
EVNB,
40, 41
I
Event count input pins
EVND
Voltage
COMP₀ – 1–4
comparator _COMP3
VC _ref
64
I
Analog input pins for voltage comparator
I
Standard voltage pin for inputting the threshold
voltage of analog input pins
4