PF658-06
E0C621C
4-bit Single Chip Microcomputer
● Core CPU Architecture
● R/F Converter
● Remote-control Carrier Output
● LCD Driver
Wide Voltage
Operation
Products
■ DESCRIPTION
The E0C621C is a single-chip microcomputer made up of the 4-bit core CPU E0C6200A, ROM, RAM, remote
controller, R/F converter, SVD circuit, LCD driver, watchdog timer and time base counter. The E0C621C is most
suitable for remote controllers with temperature measurement functions, such as a remote control unit for an air
conditioner.
■ FEATURES
● CMOS LSI 4-bit parallel processing
● Twin clock .............................................Crystal oscillation circuit (with built-in drain capacitance)
32.768kHz (Typ.)
CR or Ceramic oscillation circuit (mask option)
455kHz (Typ.) / 1MHz (Max.)
● Instruction set........................................108 instructions
● Instruction execution time .....................During operation at 32.768kHz : 153µsec, 214µsec, 366µsec
(depending on instruction)
During operation at 455kHz
During operation at 1MHz
:
:
11µsec, 15µsec, 26µsec
5µsec, 7µsec, 12µsec
● ROM capacity .......................................4,096 words × 12 bits
● RAM capacity ........................................208 words × 4 bits
● Input port ...............................................8 bits (pull up resistors may be supplemented by mask option)
● Output port ............................................4 bits (complementary output or Nch open drain output may be se-
lected by mask option)
Buzzer, clock and REM (carrier, DC) outputs may be set by software
● I/O port ..................................................4 bits
● LCD driver .............................................34 segments × 1–4 commons
Static drive or 1/2–1/4 duty dynamic drive may be selected by software
● Remote controller .................................Infrared remote-control carrier output and DC output (level output)
Soft-timer mode or hard-timer mode may be selected by software
● R/F converter ........................................1 reference resistance × 2 sensors, 16-bit counter
DC bias sensor may be connected
● Time base counter ................................Clock timer 1 system
● Watchdog timer
●
Supply voltage detection (SVD) circuit .. 2.3 ± 0.15V
● Interrupts ...............................................External : Input port interrupt
2 systems
1 system
Internal : Timer interrupt
Remote controller interrupt 1 system
R/F converter interrupt
● Supply voltage ......................................2.2V to 5.5V
● Current consumption ............................HALT mode (3.0V)
1 system
: 3.0µA (Typ.)
OPERATING mode (32.768kHz/3.0V) : 7.0µA (Typ.)
OPERATING mode (455kHz/3.0V)
OPERATING mode (1MHz/3.0V)
: 170µA (Typ.)
: 250µA (Typ.)
● Package ................................................QFP5-80pin (plastic)
Die form
SEIKO EPSON CORPORATION
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