em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 8

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Contents
viii •
6.8
6.9
6.10 Comparator .................................................................................................... 115
6.11 RESET and Wake-up ..................................................................................... 117
6.12 Interrupt .......................................................................................................... 144
6.13 LVD (Low Voltage Detector) for EM78F648/548N.......................................... 147
6.14 DATA EEPROM .............................................................................................. 150
6.15 Oscillator ........................................................................................................ 150
6.16 Power-On Considerations .............................................................................. 154
6.17 External Power-On Reset Circuit ................................................................... 154
6.18 Residue-Voltage Protection ............................................................................ 155
I2C Function ................................................................................................... 106
Dual Set of PWM (Pulse Width Modulation)................................................... 112
6.8.1
6.8.2
6.8.3
6.8.2
6.9.1
6.9.2
6.9.3
6.9.4
6.10.1 External Reference Signal ..............................................................................115
6.10.2 Internal Reference Signal................................................................................115
6.10.3 Comparator Outputs........................................................................................116
6.10.4 Interrupt ...........................................................................................................116
6.10.5 Wake-up from Sleep Mode..............................................................................117
6.11.1 RESET & Wake-up for EM78F644/642/641/544/542/541N ............................117
6.11.2 RESET & Wake-up for EM78F648/548N.........................................................128
6.11.3 The Status of RST, T, and P of STATUS Register ...........................................143
6.12.1 Interrupt for EM78F644/642/641/544/542/541N...............................................144
6.12.2 Interrupt for EM78F648/548N .........................................................................146
6.13.1 LVD Level Control ...........................................................................................147
6.13.2 LVD Interrupt ...................................................................................................148
6.13.3 LVD Function Setup ........................................................................................148
6.15.1 Oscillator Modes..............................................................................................150
6.15.2 Crystal Oscillator/Ceramic Resonators (XTAL) ...............................................151
6.15.3 External RC Oscillator Mode...........................................................................152
6.15.4 Internal RC Oscillator Mode ............................................................................153
7-Bit Slave Address .........................................................................................108
10-Bit Slave Address: ......................................................................................108
Master Mode I2C Tranmit................................................................................112
Slave Mode I2C Tranmit..................................................................................112
Overview .........................................................................................................112
Increment Timer Counter (TMRX: TMRAH/L or TMRBH/L) ............................113
PWM Period (PRDX : PRDA or PRDB)...........................................................114
PWM Duty Cycle (DTX: DTA or DTB) .............................................................114
6.8.2.1 Master-Transmitter Transmits to Slave-Receiver
6.8.2.2 Master-Receiver Reads from Slave-Transmitter
6.8.2.3 Master Transmits and Receives Data to & from
6.8.2.4 Master Device Transmits Data to Two or More
with a 10-bit Slave Address..............................................................109
with a 10-bit Slave Address..............................................................109
the Same Slave Device with 10-Bit Addresses ................................110
Slave Devices with 10 & 7 Bits Slave Address ................................110
Product Specification (V1.0) 05.05.2010