sh66k33a SinoWealth Micro-Electronics Corp. Ltd, sh66k33a Datasheet - Page 19

• Manufacturer Part Number: sh66k33a
• Description: Mask 1k 4-bit Micro-controller
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

Application Circuit (for reference only)
AP1:
Remote Control (48 Keys)
(1) Operating voltage: 3.0V
(2) Oscillator: Ceramic 455kHz (PORTE.0 - 1 shared to OSCI & OSCO)
(3) PORTA, PORTD.1, PORTD.2: I/O Buffers
(4) PORTB, C and PORTD.0: Input Buffers
(5) R1 = 0 is possible, but the REM specification is revised to reduce power consumption
(6) Since PORTD.0 is input only, PORTB or PORTC can be scanned out to detect PORTD.0 option.
100P
100P
R1
GND
V
PORTE.0/OSCI
PORTE.1/OSCO
REM
DD
PORTD.0
PORTD.2
PORTD.1
PORTC.3
PORTC.2
PORTC.1
PORTC.0
PORTB.3
PORTB.2
PORTB.1
PORTB.0
PORTA.3
PORTA.2
PORTA.1
PORTA.0
19
Simplified Custom Code
switch can be closed
Selection only one
SH66K33A