W78E054D Datasheet, PDF (2/89 Pages) List of Unclassifed Manufacturers – 8-bit microcontroller

W78E054D/W78E052D Data Sheet
13.2 Priority Level Structure ................................................................................................. 45
13.3 Interrupt Response Time .............................................................................................. 47
13.4 Interrupt Inputs .............................................................................................................. 48
14 PROGRAMMABLE TIMERS/COUNTERS ............................................................................... 49
14.1 Timer/Counters 0 & 1.................................................................................................... 49
14.2 Time-Base Selection..................................................................................................... 49
14.2.1 Mode 0 .........................................................................................................................49
14.2.2 Mode 1 .........................................................................................................................49
14.2.3 Mode 2 .........................................................................................................................50
14.2.4 Mode 3 .........................................................................................................................50
14.3 Timer/Counter 2 ............................................................................................................ 51
14.3.1 Capture Mode...............................................................................................................51
14.3.2 Auto-Reload Mode, Counting up ..................................................................................52
14.3.3 Auto-reload Mode, Counting Up/Down .........................................................................52
14.3.4 Baud Rate Generator Mode..........................................................................................53
15 WATCHDOG TIMER................................................................................................................. 54
16 SERIAL PORT........................................................................................................................... 55
16.1 MODE 0 ........................................................................................................................ 56
16.2 MODE 1 ........................................................................................................................ 57
16.3 MODE 2 ........................................................................................................................ 58
17 FLASH ROM CODE BOOT MODE SLECTION........................................................................ 61
18 ISP (IN-SYSTEM PROGRAMMING) ........................................................................................ 62
19 CONFIG BITS ........................................................................................................................... 66
20 ELECTRICAL CHARACTERISTICS ......................................................................................... 68
20.1 Absolute Maximum Ratings .......................................................................................... 68
20.2 DC ELECTRICAL CHARACTERISTICS ...................................................................... 69
20.3 AC ELECTRICAL CHARACTERISTICS....................................................................... 70
20.3.1 Clock Input Waveform ..................................................................................................70
20.3.2 Program Fetch Cycle....................................................................................................71
20.3.3 Data Read Cycle ..........................................................................................................71
20.3.4 Data Write Cycle...........................................................................................................71
20.3.5 Port Access Cycle ........................................................................................................72
20.4 TIMING waveforms ....................................................................................................... 73
20.4.1 Program Fetch Cycle....................................................................................................73
20.4.2 Data Read Cycle ..........................................................................................................73
20.4.3 Data Write Cycle...........................................................................................................74
20.4.4 Port Access Cycle ........................................................................................................74
20.4.5 Reset Pin Access Cycle ...............................................................................................75
21 APPLICATION CIRCUITS ........................................................................................................ 76
21.1 External Program Memory and Crystal ........................................................................ 76
21.2 Expanded External Data Memory and Oscillator.......................................................... 76
21.3 Internal Program Memory and Oscillator for EFT application ...................................... 77
21.4 Reference Value of XTAL ............................................................................................. 77
22 APPLICATION NOTE ............................................................................................................... 78
Publication Release Date: Jun 9, 2015
-2-
Revision A13