The EM78P346N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It has as an on-chip 4Kx13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a protection bit to prevent intrusion of user's OTP memory code. Three Code option bits are also available to meet user's requirements.
With its enhanced OTP-ROM feature, the device provides a convenient way of developing and verifying user's programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development and programming tools. User can avail of the ELAN Writer to easily program his development code.
- 4Kx13 bits on-chip ROM
- 144x8 bits on-chip registers (SRAM)
- 8-level stacks for subroutine nesting
- 4 programmable Level Voltage Detector (LVD) : 4.5V, 4.0V, 3.3V, 2.3V
- 3 programmable Level Voltage Reset (LVR) : 4.1V, 3.7V, 2.4V
- Less than 1.5 mA at 5V/4MHz
- Typically 15 uA, at 3V/32kHz
- Typically 2 uA, during sleep mode
- 3 bidirectional I/O ports
- Wake-up port : P6
- 21 programmable pull-down I/O pins
- 21 programmable pull-high I/O pins
- 22 programmable open-drain I/O pins
- 4 programmable high-sink I/O pins
- External interrupt : P50
- 2.1V~5.5V at 0°C~70°C (commercial)
- 2.3V~5.5V at -40°C~85°C (industrial)
- Operating frequency range (base on 2 clocks):
- Crystal mode: DC ~ 16MHz, 4.5V;
DC ~ 8MHz, 3V; DC ~ 4MHz, 2.1V
- RC mode: DC ~ 16MHz, 4.5V;
DC ~ 12MHz, 4V; DC ~ 4MHz, 2.1V
- Internal RC Drift Rate (Ta=25°C, VDD=5V±5%, VSS=0V)n
| Internal RC Frequency |
Drift Rate |
| Temperature(-40°C~85°C) |
Voltage(2.3V~5.5V) |
Process |
Total |
| 455kHz |
±5% |
±5% |
±4% |
±14% |
| 1MHz |
±5% |
±5% |
±4% |
±14% |
| 4MHz |
±5% |
±5% |
±4% |
±14% |
| 16MHz |
±5% |
±5% |
±4% |
±14% |
- All the four main frequencies can be trimmed by programming with four calibrated bits in the ICE346N Simulator. OTP is auto trimmed by ELAN Writer.
- Fast set-up time requires only 0.8ms (HXT2, 4MHz)in high Crystal and 32 CLKS in IRC mode from wake up to operating mode
- Peripheral configuration
- 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
- 8-bit multi-channel Analog-to-Digital Converter with 12-bit resolution in Vref mode
- Three Pulse Width Modulation (PWM ) with 10-bit resolution
- One pair of comparator (offset voltage: 5mV)
- One pair of OP (offset voltage: 5mV)
- Power-down (Sleep) mode
- High EFT immunity (4MHz, 4clocks)
- Seven available interrupts
- TCC overflow interrupt
- Input-port status changed interrupt (wake up from sleep mode)
- External interrupt
- ADC completion interrupt
- PWM period match completion
- Comparator high/low interrupt
- Low voltage detector interruptn
- Programmable free running Watchdog Timer
- Watchdog Timer: 16.5ms ± 5% with Vdd =5V at 25°C, Temperature range ± 5% (-40°C ~+85°C)
- Watchdog Timer: 18ms ± 5% with Vdd =3V at 25°C ,Temperature range ± 5% (-40°C~+85°C)
- Two clocks per instruction cyclen
- 18-pin DIP 300mil : EM78P346ND18J/S
- 18-pin SOP 300mil : EM78P346NSO18J/S
- 20-pin DIP 300mil : EM78P346ND20J/S
- 20-pin SOP 300mil : EM78P346NSO20J/S
- 20-pin SSOP 209mil : EM78P346NSS20J/S
- 24-pin skinny DIP 300mil : EM78P346NK24J/S
- 24 pin SOP 300mil : EM78P346NSO24J/S
- 24 pin SSOP 150mil : EM78P346NSS24J/S
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