ADE75 datasheet(5/148 Pages) AD

5 / 148 page

Preliminary Technical Data

ADE75xx/ADE71xx

Rev. PrE | Page 5 of 148

Addressing Modes.......................................................................77

Instruction set..............................................................................78

Read-Modify-Write Instructions ..............................................81

Instructions that Affect Flags ....................................................81

Interrupt System ..............................................................................84

Standard 8051 Interrupt Architecture ......................................84

ADE75XX/ADE71XX Interrupt Architecture ........................84

Interrupt SFR register list...........................................................84

Interrupt Priority.........................................................................87

Interrupt Flags .............................................................................87

Interrupt Vectors .........................................................................90

Interrupt Latency ........................................................................90

Context Saving.............................................................................90

Watchdog Timer..............................................................................91

Watchdog Timer Interrupt ....................................................92

LCD Driver ......................................................................................93

LCD SFR Register list .................................................................93

LCD Setup ....................................................................................98

LCD Timing and Waveforms.....................................................98

BLINK mode................................................................................98

Software Controlled Blink Mode ..........................................98

Automatic Blink Mode ...........................................................98

Display Element Control............................................................98

Writing to LCD Data registers ..............................................99

Reading LCD Data registers ..................................................99

Voltage generation ......................................................................99

Power Consumption...............................................................99

Contrast control ......................................................................99

Lifetime Performance .............................................................99

LCD External Circuitry........................................................... 100

LCD Function in PSM2........................................................... 100

Example LCD Setup................................................................. 100

Flash memory ............................................................................... 102

Flash memory Overview..........................................................102

Flash/EE Memory Reliability ..............................................102

Flash memory organization.....................................................102

Using the Flash Memory..........................................................103

ECON—Flash/EE Memory Control SFR ..........................103

Flash functions ......................................................................106

Protecting the Flash ..................................................................106

Enabling Flash Protection by Code....................................107

Enabling Flash Protection by emulator commands .........107

Notes on Flash Protection....................................................108

Flash memory timing ...........................................................108

In circuit programming............................................................108

Serial Downloading ..............................................................108

Timers.............................................................................................109

Timer sfr register list ................................................................109

Timer 0 and Timer 1.................................................................112

Timer/Counter 0 and 1 Data Registers..............................112

Timer/Counter 0 and 1 Operating Modes ........................112

Timer 2 .......................................................................................113

Timer/Counter 2 Data Registers.........................................113

Timer/Counter 2 Operating Modes ...................................113

PLL ..................................................................................................115

PLL SFR register list..................................................................115

RTC - Real Time Clock ................................................................117

RTC SFR register list.................................................................117

Read and Write operations ......................................................120

Writing the RTC Registers...................................................120

Reading the RTC Counter SFRs .........................................120

RTC Modes ................................................................................121

RTC Interrupts ..........................................................................121

Interval Timer Alarm ...........................................................121

RTC Calibration ........................................................................121

UART serial interface ...................................................................123

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