EM78P157NBM Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM78P157NBM

8-Bit Microcontroller with OTP ROM

ELAN Microelectronics 

Contents

4.7 Oscillator .......................................................................................................... 23

4.7.1 Oscillator Modes................................................................................................23

4.7.1.1 Oscillator Modes Defined by OSC, HLF, and HLP.............................23

4.7.1.2 The Summary of Maximum Operating Speeds ..................................23

4.7.2 Crystal Oscillator/Ceramic Resonators (XTAL) .................................................23

4.7.2.1 Capacitor Selection Guide for Crystal Oscillator or

Ceramic Resonator ............................................................................24

4.7.3 External RC Oscillator Mode.............................................................................25

4.7.3.1 RC Oscillator Frequencies .................................................................26

4.8 CODE Option Register ..................................................................................... 26

4.8.1 Code Option Register (Word 0).........................................................................26

4.8.2 Customer ID Register (Word 1).........................................................................27

4.9 Power-On Considerations ................................................................................ 28

4.10 External Power-On Reset Circuit .................................................................... 28

4.11 Residual-Voltage Protection ............................................................................. 29

4.12 Instruction Set .................................................................................................. 30

4.13 Timing Diagrams .............................................................................................. 32

4.13.1 AC Test Input/Output Waveform........................................................................32

4.13.2 RESET Timing (CLK = ”0”)................................................................................32

4.13.3 TCC Input Timing (CLKS = ”0”) .........................................................................32

5 Absolute Maximum Ratings........................................................................ 33

6 Electrical Characteristics............................................................................ 33

6.1 DC Electrical Characteristic.............................................................................. 33

6.2 AC Electrical Characteristics ............................................................................ 34

6.3 Device Characteristics...................................................................................... 35

6.3.1 Port 6 Vih/Vil vs. VDD (Input Pin with Schmitt Inverter) ....................................35

6.3.2 Port 5 Input Threshold Voltage (Vth) vs. VDD...................................................35

6.3.3 Ports 5 & Port 6 Voh vs. Ioh, VDD=5V and 3V .................................................36

6.3.4 Ports 5 & Port 6 Vol vs. Iol, VDD=5V and 3V....................................................36

6.3.5 WDT Time Out Period vs. VDD (Prescaler Set to 1:1)......................................37

6.3.6 Typical RC OSC Frequency vs. VDD (Cext = 100pF, Temp. = 25℃) ..............38

6.3.7 Typical RC OSC Frequency vs. VDD

(with R and C under Ideal Conditions) ..............................................................38

6.3.8 Typical and Maximum Operating Current

(ICC1/2/3/4) vs. Temperature ............................................................................39

6.3.9 Typical and Maximum Standby Current

(ISB1 and ISB2) vs. Temperature .....................................................................41

6.3.10 Operating Voltage under Temperature Range of 0°C to 70°C

and –40°C to 85°C ............................................................................................42

6.3.11 Operating Current Range (Based on High and Low Freq. @ =25℃)

vs. Voltage.........................................................................................................43

iv •

Product Specification (V1.0) 09.22.2005

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