Document
W78E65/W78E065A Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 3 2. FEATURES ................................................................................................................................. 3 3. PIN CONFIGURATIONS ............................................................................................................ 4 4. PIN DESCRIPTION..................................................................................................................... 5 5. BLOCK DIAGRAM ...................................................................................................................... 6 6. FUNCTIONAL DESCRIPTION ................................................................................................... 7
6.1 RAM ................................................................................................................................ 7 6.2 Timers 0, 1, and 2........................................................................................................... 8
6.2.1 Timer 2 Output .................................................................................................................8
6.3 Clock ............................................................................................................................... 8
6.3.1 Crystal Oscillator ..............................................................................................................8 6.3.2 External Clock ..................................................................................................................8
6.4 Power Management........................................................................................................ 8
6.4.1 Idle Mode..........................................................................................................................8 6.4.2 Power-down Mode............................................................................................................9 6.4.3 Reduce EMI Emission ......................................................................................................9
6.5 Reset............................................................................................................................... 9
6.5.1 W78E65 Special Function Registers (SFRs) and Reset Values.....................................10
6.6 Port 4 ............................................................................................................................ 11
6.6.1 Port Options Register .....................................................................................................11 6.6.2 INT2 / INT3 ..................................................................................................................11 6.6.3 Port 4 Base Address Registers ......................................................................................13.