Rainbow Electronics AT89LP214 - Manual (Page 87)

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3538A–MICRO–7/06
AT89LP213/214 [Preliminary]
Table of Contents
1. Description ............................................................................................... 1
2. Pin Configuration ..................................................................................... 2
2.1 AT89LP213: 14-lead TSSOP/PDIP ......................................................................2
2.2 AT89LP214: 14-lead TSSOP/PDIP ......................................................................2
3. Pin Description ......................................................................................... 3
4. Block Diagram .......................................................................................... 5
5. Comparison to Standard 8051 ................................................................ 6
5.1 System Clock .......................................................................................................6
5.2 Instruction Execution7/06 with Single-Cycle Fetch ..............................................6
5.3 Interrupt Handling .................................................................................................6
5.4 Timer/Counters ....................................................................................................6
5.5 Serial Port ............................................................................................................6
5.6 Watchdog Timer ...................................................................................................7
5.7 I/O Ports ...............................................................................................................7
5.8 Reset ....................................................................................................................7
6. Memory Organization .............................................................................. 7
6.1 Program Memory .................................................................................................7
6.2 Data Memory ........................................................................................................8
7. Special Function Registers ..................................................................... 9
8. Enhanced CPU ....................................................................................... 10
8.1 Restrictions on Certain Instructions ...................................................................11
9. System Clock ......................................................................................... 12
9.1 Crystal Oscillator ................................................................................................12
9.2 External Clock Source ........................................................................................12
9.3 Internal RC Oscillator .........................................................................................12
9.4 System Clock Out ..............................................................................................12
10. Reset ....................................................................................................... 13
10.1 Power-on Reset .................................................................................................13
10.2 Brown-out Reset ................................................................................................15
10.3 External Reset ....................................................................................................15
10.4 Watchdog Reset .................................................................................................16
10.5 Software Reset ...................................................................................................16