1 General Description
The EM78P153B is an 8-bit microprocessor designed and developed with low-power and
high-speed CMOS technology. The device has an on-chip 1024×13-bit Electrical One Time
Programmable Read Only Memory (OTP-ROM). It provides three protection bits to prevent
intrusion of user’s OTP memory code. Fifteen code option bits are also available to meet your
special requirements.
With enhanced OTP-ROM features, the EM78P153B provides a convenient method of
developing and verifying user’s programs. Moreover, this OTP device offers easy and effective
program updates with the use of development and programming tools. You can avail of the
ELAN Writer to easily program your development codes.
2 Features
&#; CPU Configuration
• 1k × 13 bits on chip ROM
• 32 × 8 bits on-chip registers (SRAM, general
purpose)
• 5 level stacks for subroutine nesting
• Less than 1.5 mA at 5V / 4MHz
• Typically 15 μA at 3V / 32kHz
• Typically 1 μA during Sleep mode
&#; I/O Port Configuration
• 2 bidirectional I/O ports : P5, P6
• 12 I/O pins
• Wake-up port : P6
• 6 Programmable pull-down I/O pins
• 7 programmable pull-high I/O pins
• 7 programmable open-drain I/O pins
• External interrupt : P60
&#; Operating Voltage Range:
• 2.3V ~ 5.5V at 0 ~ 70°C (Commercial Grade)
&#; Operating Frequency Range (Base on 2 clocks):
• Crystal Mode:
DC ~ 20MHz / 2clks @ 5V
DC ~ 8MHz / 2clks @ 3V
DC ~ 4MHz / 2clks @ 2.3V
The transient point of system frequency
between HXT and LXT is 400kHz.
• ERC Mode:
DC ~ 2MHz / 2clks @ 2.1V
• IRC Mode:
Oscillation Mode: 4 / 8 / 1MHz and 455kHz
Process Deviation: Type: Max. ± 3%
Temperature Deviation: ± 2% (0 ~ 70°C)
Drift Rate
Internal
RC Freq. Temp.
(0~70°C) Voltage Process Total
4 MHz ±1.5% ±8%@2.3~5.5V ±2% ±11.5%
8 MHz ±1.5% ±8%@3.0~5.5V ±2% ±11.5%
1 MHz ±1.5% ±8%@2.3~5.5V ±2% ±11.5%
455kHz ±1.5% ±8%@2.3~5.5V ±2% ±11.5%
&#; Peripheral Configuration
• 8-bit real time clock / counter (TCC) with selective
signal sources, trigger edges, and overflow
interrupt
• Power on reset and 3 programmable level voltage
reset
POR: 1.8V (Default), LVR: 4.0, 3.5, 2.7V
• 2- / 4 clocks per instruction cycle selected by code
option
&#; Three Available Interrupts:
• TCC overflow interrupt
• Input-port status changed interrupt (Wake-up from
Sleep mode)
• External interrupt
&#; Special Features
• Programmable free running watchdog timer
• Power saving Sleep mode
• Selectable oscillation mode
• Programmable prescaler of oscillator set-up time
&#; Package Type:
• 14-pin DIP 300mil : EM78P153BD14J
• 14-pin SOP 150mil : EM78P153BSO14J
• 10-pin SSOP 150mil : EM78P153BSS10J
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