em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 4

• Manufacturer Part Number: em78p134n
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Contents
iv •
6
5.4
5.5
5.6
5.7
5.8
5.9
5.10 Oscillator .......................................................................................................... 39
5.11 Power-on Considerations ................................................................................. 44
5.12 Code Option Register....................................................................................... 45
5.13 Instruction Set .................................................................................................. 48
Absolute Maximum Ratings ................................................................................... 52
I/O Ports ........................................................................................................... 19
Reset and Wake-up.......................................................................................... 22
Interrupt ............................................................................................................ 31
PWM (Pulse Width Modulation) ....................................................................... 33
Timer ................................................................................................................ 35
Comparator ...................................................................................................... 37
5.5.1
5.5.2
5.5.3
5.5.4
5.7.1
5.7.2
5.7.3
5.7.4
5.7.5
5.7.6
5.8.1
5.8.2
5.8.3
5.8.4
5.9.1
5.9.2
5.9.3
5.9.4
5.10.1 Oscillator Modes................................................................................................39
5.10.2 Crystal Oscillator/Ceramic Resonators (Crystal)...............................................40
5.10.3 External RC Oscillator Mode.............................................................................41
5.10.4 Internal RC Oscillator Mode ..............................................................................42
5.11.1 External Power-on Reset Circuit .......................................................................44
5.11.2 Residual Voltage Protection ..............................................................................45
5.12.1 Code Option Register (Word 0).........................................................................46
5.12.2 Code Option Register (Word 1).........................................................................47
5.12.3 Customer ID Register (Word 2).........................................................................48
Reset .................................................................................................................22
Wake-up and Interrupt Modes Operation Summary .........................................24
/RESET Configuration .......................................................................................30
Status of RST, T, and P of the Status Register..................................................30
Overview ...........................................................................................................33
Increment Timer Counter (TMRX: TMRH/TMRL)..............................................34
PWM Time Period (PRDX: TMRH/PRDL).........................................................34
PWM Duty Cycle (DTX: TMRH/DTL) ................................................................35
Comparator .......................................................................................................35
PWM Programming Process/Steps...................................................................35
Overview ...........................................................................................................35
Function Description..........................................................................................36
Programming the Related Registers .................................................................36
Timer Programming Process/Steps...................................................................36
External Reference Signal ................................................................................37
Comparator Outputs..........................................................................................38
Comparator Interrupt .........................................................................................38
Wake-up from Sleep Mode................................................................................39
5.8.3.1 TMR Related Control Registers .........................................................36
Product Specification (V1.6) 06.02.2010