W77C32 datasheet(2/78 Pages) WINBOND

2 / 78 page

W77C32/W77C032A

- 2 -

12.1.2

Mode 0....................................................................................................................52

12.1.3

Mode 1....................................................................................................................52

12.1.4

Mode 2....................................................................................................................52

12.1.5

Mode 3....................................................................................................................53

12.2

Timer/Counter 2 ............................................................................................................ 54

12.2.1

Capture Mode.........................................................................................................54

12.2.2

Auto-reload Mode, Counting Up .............................................................................54

12.2.3

Auto-reload Mode, Counting Up/Down ...................................................................55

12.2.4

Baud Rate Generator Mode....................................................................................56

12.2.5

Programmable Clock-out ........................................................................................56

13.

WATCHDOG TIMER................................................................................................................. 57

14.

SERIAL PORT .......................................................................................................................... 59

15.

TIMED ACCESS PROTECTION .............................................................................................. 65

16.

ELECTRICAL CHARACTERISTICS......................................................................................... 67

16.1

Absolute Maximum Ratings .......................................................................................... 67

16.2

D.C. Characteristics...................................................................................................... 67

16.3

A.C. Characteristics ...................................................................................................... 68

16.3.1

External Clock Characteristics ................................................................................68

16.3.2

A.C. Specification ...................................................................................................69

16.3.3

MOVX Characteristics Using Stretch Memory Cycles ............................................70

16.3.4

Explanation of Logic Symbols.................................................................................71

17.

TIMING WAVEFORMS ............................................................................................................. 72

17.1

Program Memory Read Cycle ...................................................................................... 72

17.2

Data Memory Read Cycle............................................................................................. 72

17.3

Data Memory Write Cycle............................................................................................. 73

18.

TYPICAL APPLICATION CIRCUITS ........................................................................................ 74

18.1

Expanded External Program Memory and Crystal ....................................................... 74

18.2

Expanded External Data Memory and Oscillator ......................................................... 75

19.

PACKAGE DIMENSIONS ......................................................................................................... 76

19.1

40-pin DIP ..................................................................................................................... 76

19.2

44-pin PLCC ................................................................................................................. 77

19.3

44-pin QFP.................................................................................................................... 77

20.

REVISION HISTORY ................................................................................................................ 78

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