PF537-08
E0C621A
4-bit Single Chip Microcomputer
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oltan
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ow ratio s
L e
t
Op oduc
Pr
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Core CPU Architecture
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32kHz/455kHz Twin Clock Operation
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SVD Circuit/Analog Comparator
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Watchdog Timer
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DESCRIPTION
The E0C621A is a CMOS 4-bit microcomputer using an E0C6200A as its core processor. It contains ROM,
RAM, LCD driver circuit, remote-control carrier output circuit, time base counter, analog comparator, watchdog
timer and other functions on a single chip. The E0C621A provides an excellent solution for low-power system
applications such as an infrared remote controller with clock function.
One time PROM version is available.
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FEATURES
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CMOS LSI 4-bit parallel processing
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Twin clock ............................................. 32.768kHz (Typ.) Crystal
455kHz (Typ.)
CR or Ceramic oscillation circuit
(selectable by mask option)
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Instruction set ........................................ 100 instructions
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Instruction cycle time ............................ 32kHz clock mode : 153µsec, 214µsec or 366µsec
455kHz clock mode : 11µsec, 15µsec or 26µsec
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ROM capacity ....................................... 4,096
×
12 bits
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RAM capacity ........................................ 208
×
4 bits
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Input port ............................................... 8 bits (pull-up resistors are available by mask option)
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Output port ............................................ 9 bits (clock, buzzer output is available by mask option)
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I/O port .................................................. 4 bits
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Remote control carrier (REM) ............... 1 bit (hardware timer or software timer is selectable by software)
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LCD driver ............................................. 32 segments
×
3 commons or 32 segments
×
4 commons
(1/3 or 1/4 duty is selectable by mask option)
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Built-in LCD power supplies .................. Voltage regulator, voltage doubler and voltage tripler
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Built-in SVD circuit ................................ 2.3V
±
0.1V (supply voltage detector) Criteria voltage
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Built-in amplifier .................................... Operational amplifier for MOS input analog comparator
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Built-in watchdog timer (Mask option)
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Interrupts ............................................... External : Input interrupt
2 lines
Internal : Timer interrupt (32Hz, 8Hz, 2Hz) 1 line (3ch.)
REM interrupt
1 line
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Supply voltage ...................................... 3.0V (2.2V to 3.5V)
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Current consumption ............................ HALT mode (32.768kHz)
: 2µA (Typ.)
OPERATING mode (455kHz) : 130µA (Typ.)
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Package ................................................ QFP5-80pin (plastic), QFP14-80pin (plastic)
Die form
SEIKO EPSON CORPORATION
1
SEIKO [ SEIKO EPSON CORPORATION ]
