W78E858 Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
4.
5.
GENERAL DESCRIPTION ......................................................................................................... 3
FEATURES................................................................................................................................. 3
PIN CONFIGURATIONS ............................................................................................................ 4
PIN DESCRIPTION..................................................................................................................... 5
FUNCTIONAL DESCRIPTION ................................................................................................... 6
5.1
5.2
RAM................................................................................................................................ 6
EEPROM ........................................................................................................................ 6
5.2.1 Byte Write Mode...............................................................................................................6
5.2.2 Page Write Mode..............................................................................................................6
5.2.3 Software Protected Data Write .........................................................................................7
5.2.4 Command Codes for Software Data Protection Enable/Disable and Software Erase.......7
Demo Code:.................................................................................................................... 8
On-chip Flash EPROM ................................................................................................. 10
Timers 0, 1, and 2......................................................................................................... 11
Clock............................................................................................................................. 11
Crystal Oscillator........................................................................................................... 11
External Clock............................................................................................................... 11
Power Management...................................................................................................... 11
5.9.1 Idle Mode........................................................................................................................11
5.9.2 Power-down Mode..........................................................................................................11
5.9.3 Wake-up Via External Interrupts INT0 to INT9 ...............................................................12
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10 Reset............................................................................................................................. 13
5.11 Pulse Width Modulator System .................................................................................... 15
5.11.1 PWMCON (91H)...........................................................................................................15
5.11.2 PWMP (92H) ................................................................................................................15
5.12 In-system Programming System .................................................................................. 16
5.12.1 SFRAL (C4H) ...............................................................................................................16
5.12.2 SFRAH (C5H)...............................................................................................................16
5.12.3 SFRFD (C6H)...............................................................................................................16
5.12.4 SFRCN (C7H)...............................................................................................................17
5.13 In-system Programming Mode Operating Table .......................................................... 17
5.13.1 CHPCON (BFH) ...........................................................................................................18
5.14 MXPSR (A2H)............................................................................................................... 18
5.15 Interrupt System ........................................................................................................... 18
5.16 External Interrupts INT2 to INT9................................................................................... 19
5.16.1 IE_1 (E8H)....................................................................................................................19
Publication Release Date: November 6, 2006
- 1 -
Revision A7
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