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TABLE OF CONTENTS
CHAPTER 1 GENERAL DESCRIPTION ................................................................................................. 1
1.1
1.2
1.3
1.4
FUNCTION LIST........................................................................................................................................ 2
ORDERING INFORMATION ..................................................................................................................... 3
BLOCK DIAGRAM .................................................................................................................................... 4
PIN CONFIGURATION (TOP VIEW) ........................................................................................................ 5
CHAPTER 2 PIN FUNCTIONS ............................................................................................................... 9
2.1
2.2
2.3
2.4
PIN FUNCTIONS ....................................................................................................................................... 9
PIN INPUT/OUTPUT CIRCUIT ............................................................................................................... 11
PROCESSING OF UNUSED PINS......................................................................................................... 14
NOTES ON USING RESET PIN AND P1B
0
PIN ................................................................................... 15
CHAPTER 3 PROGRAM COUNTER (PC) ........................................................................................... 17
3.1
3.2
PROGRAM COUNTER CONFIGURATION............................................................................................ 17
PROGRAM COUNTER OPERATION..................................................................................................... 17
3.2.1
At Reset ..................................................................................................................................... 18
3.2.2
During Execution of the Branch Instruction (BR)..................................................................... 18
3.2.3
During Execution of Subroutine Calls (CALL).......................................................................... 19
3.2.4
During Execution of Return Instructions (RET, RETSK, RETI) ............................................... 20
3.2.5
During Table Reference (MOVT) .............................................................................................. 20
3.2.6
During Execution of Skip Instructions (SKE, SKGE, SKLT, SKNE, SKT, SKF)...................... 21
3.2.7
When an Interrupt Is Received ................................................................................................. 21
CHAPTER 4 PROGRAM MEMORY (ROM).......................................................................................... 23
4.1
4.2
PROGRAM MEMORY CONFIGURATION ............................................................................................. 23
PROGRAM MEMORY USAGE ............................................................................................................... 24
4.2.1
Flow of the Program .................................................................................................................. 24
4.2.2
Table Reference......................................................................................................................... 27
CHAPTER 5 DATA MEMORY (RAM) .................................................................................................... 31
5.1
DATA MEMORY CONFIGURATION ....................................................................................................... 31
5.1.1
System Register (SYSREG) ..................................................................................................... 32
5.1.2
Data Buffer (DBF)...................................................................................................................... 32
5.1.3
General Register (GR) .............................................................................................................. 33
5.1.4
Port Registers ............................................................................................................................ 33
5.1.5
General Data Memory ............................................................................................................... 34
5.1.6
Unmounted Data Memory ......................................................................................................... 34