3826 Group (One Time PROM version)
REJ03B0181-0100
Rev.1.00
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Sep 06, 2006
Serial interface
DESCRIPTION
The 3826 group is the 8-bit microcomputer based on the 740 fam-
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Serial I/O1...................... 8-bit ✕ 1 (UART or Clock-synchronous)
Serial I/O2 .................................... 8-bit ✕ 1 (Clock-synchronous)
PWM output .................................................................... 8-bit ✕ 1
A/D converter ............. 10-bit ✕ 8 channels or 8-bit ✕ 8 channels
D/A converter .................................................. 8-bit ✕ 2 channels
(used as DTMF and CTCSS function)
ily core technology.
The 3826 group has the LCD drive control circuit, an 8-channel A/
D converter, D/A converter, serial interface and PWM as additional
functions.
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The various microcomputers in the 3826 group (One Time PROM
version) include variations of internal memory size and packaging.
This datasheet describes only the One Time PROM version (ROM
60 K version) of 3826 Group.
LCD drive control circuit
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Bias ......................................................................... 1/2, 1/3
Duty .................................................................. 1/2, 1/3, 1/4
Common output ................................................................ 4
Segment output .............................................................. 40
2 Clock generating circuits
FEATURES
Basic machine-language instructions ....................................... 71
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(connect to external ceramic resonator or quartz-crystal oscillator)
Watchdog timer ............................................................. 14-bit ✕ 1
Power source voltage
The minimum instruction execution time ............................ 0.5 µs
(at 8MHz oscillation frequency)
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Memory size
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In high-speed mode (f(XIN) = 8 MHz) ..................... 4.0 V to 5.5 V
In middle-speed mode (f(XIN) = 8 MHz) ................. 2.5 V to 5.5 V
In low-speed mode.................................................. 2.5 V to 5.5 V
Power dissipation
ROM ............................................................................. 60 K bytes
RAM ............................................................................ 2560 bytes
Programmable input/output ports ............................................. 55
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Software pull-up resistors .................................................... Built-in
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In high-speed mode ................................................... Typ. 32 mW
(f(XIN) = 8 MHz, VCC = 5 V, Ta = 25 °C)
Output ports ................................................................................. 8
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Input ports .................................................................................... 1
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In low-speed mode......................................................Typ. 45 µW
(f(XIN) = stop, f(XCIN) = 32 kHz, VCC = 3 V, Ta = 25 °C)
Operating temperature range ................................... – 20 to 85°C
Interrupts .................................................. 17 sources, 16 vectors
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External ................ 7 sources (includes key input interrupt)
Internal ................................................................ 9 sources
Software ................................................................ 1 source
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APPLICATIONS
Camera, cordless phone, wireless application, household appli-
Timers ............................................................ 8-bit ✕ 3, 16-bit ✕ 2
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ances, etc.
Rev.1.00 Sep 06, 2006 page 1 of 88
REJ03B0181-0100
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