CPU
- 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)
- Operation speed: DC ~ 10MHz clock input
- 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
- Totally 272 bytes SRAM
* 144 bytes general purpose register * 128 bytes on chip data RAM
- 4K x 13 bits OTP - ROM (One Time Programmable - Read Only Memory)
- 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
- 8-level stack for subroutine nesting
- 8-bit real time clock/counter (TCC)
- One infrared transmitter/PWM generator function
- 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
- Programmable free running on chip watchdog timer (WDT). This function can operate on Normal, Green and Idle mode
- 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
- Input port wake up function (PORT6, PORT8). Working on Idle and Sleep mode
- 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)
- 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)
- Power on voltage detector provided (2.0 ∮ 0.1V) for EM78P468N
- Power on voltage detector provided (1.7 ∮ 0.1V) for EM78P468L
|