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CPU
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Operating voltage and temperature range:
* EM78P468N:
* Commercial:2.3V ~ 5.5 V. (at 0℃~+70℃)
* Industrial: 2.5V ~ 5.5 V. (at -40℃~+85℃)
* EM78P468L:
* Commercial:2.1 V ~ 5.5 V. (at ℃~+70℃)
* Industrial: 2.3V ~ 5.5 V. (at -40℃~+85℃)
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Operation speed: DC ~ 10MHz clock input
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Dual clock operation
* High frequency oscillator can select among Crystal, RC, or PLL (phase lock loop)
* Low frequency oscillator can select between Crystal or RC mode
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Totally 272 bytes SRAM
* 144 bytes general purpose register
* 128 bytes on chip data RAM
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4K x 13 bits OTP - ROM (One Time Programmable - Read Only Memory)
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Up to 28 bi-directional tri-state I/O ports
* Typically, 12 bi-directional tri-state I/O ports
* 16 bi-directional tri-state I/O ports shared with LCD segment output pin
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8-level stack for subroutine nesting
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8-bit real time clock/counter (TCC)
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One infrared transmitter/PWM generator function
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Four sets of 8 bits auto reload down-count timer can be used as interrupt sources
* Counter 1: independent down-count timer
* Counter 2, High Pulse Width Timer (HPWT), and Low Pulse Width Timer (LPWT) shared with IR function
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Programmable free running on chip watchdog timer (WDT). This function can operate on Normal, Green and Idle mode
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Operation modes:
* Normal mode: The CPU operated on frequency of main oscillator (Fm)
* Green mode: The CPU operated on frequency sub-oscillator (Fs) and main oscillator (Fm) stop
* Idle mode: CPU idle, LCD display remains working
* Sleep mode: whole chip stop working
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Input port wake up function (PORT6, PORT8). Working on Idle and Sleep mode
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Eight interrupt sources, three external and five internal
* Internal interrupt source : TCC; Counter 1,2; High/Low pulse width timer.
* External interrupt source : INT0, INT1 and Pin change wake-up (Port 6 and Port 8)
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Packages:
* Dice form : 59 pin
* QFP-64 pin : EM78P468NQ (Body 14mm*20mm)
* QFP-64 pin : EM78P468LQ (Body 14mm*20mm)
* LQFP-64 pin : EM78P468NAQ (Body 7mm*7mm)
* LQFP-64 pin : EM78P468LAQ (Body 7mm*7mm)
* LQFP-44 pin : EM78P468NBQ (Body 10mm*10mm)
* LQFP-44 pin : EM78P468LBQ (Body 10mm*10mm)
* QFP-44 pin : EM78P468NCQ (Body 10mm*10mm)
* QFP-44 pin : EM78P468LCQ (Body 10mm*10mm)
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Power on voltage detector provided (2.0 ± 0.1V) for EM78P468N
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Power on voltage detector provided (1.7 ± 0.1V) for EM78P468L
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