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8XC251SA, SB, SP, SQ USER’S MANUAL
xiv
TABLES
Table Page
10-4 Timer 1 Generated Baud Rates for Serial I/O Modes 1 and 3..................................10-12
10-5 Selecting the Baud Rate Generator(s) .....................................................................10-13
10-6 Timer 2 Generated Baud Rates ...............................................................................10-14
12-1 Pin Conditions in Various Modes................................................................................12-3
13-1 External Memory Interface Signals.............................................................................13-2
13-2 Bus Cycle Definitions (No Wait States)......................................................................13-3
13-3 Port 0 and Port 2 Pin Status In Normal Operating Mode..........................................13-16
14-1 Programming and Verifying Modes............................................................................14-4
14-2 Lock Bit Function........................................................................................................14-8
14-3 Contents of the Signature Bytes.................................................................................14-9
A-1 Notation for Register Operands...................................................................................A-2
A-2 Notation for Direct Addresses......................................................................................A-3
A-3 Notation for Immediate Addressing.............................................................................A-3
A-4 Notation for Bit Addressing..........................................................................................A-3
A-5 Notation for Destinations in Control Instructions ......................................................... A-3
A-6 Instructions for MCS® 51 Microcontrollers..................................................................A-4
A-7 New Instructions for the MCS® 251 Architecture........................................................A-5
A-8 Data Instructions .........................................................................................................A-6
A-9 High Nibble, Byte 0 of Data Instructions...................................................................... A-6
A-10 Bit Instructions............................................................................................................. A-7
A-11 Byte 1 (High Nibble) for Bit Instructions.......................................................................A-7
A-12 PUSH/POP Instructions ..............................................................................................A-8
A-13 Control Instructions ....................................................................................................A-8
A-14 Displacement/Extended MOVs....................................................................................A-9
A-15 INC/DEC.................................................................................................................... A-10
A-16 Encoding for INC/DEC .............................................................................................. A-10
A-17 Shifts ......................................................................................................................... A-10
A-18 State Times to Access the Port SFRs....................................................................... A-12
A-19 Summary of Add and Subtract Instructions...............................................................A-14
A-20 Summary of Compare Instructions............................................................................A-15
A-21 Summary of Increment and Decrement Instructions................................................. A-16
A-22 Summary of Multiply, Divide, and Decimal-adjust Instructions..................................A-16
A-23 Summary of Logical Instructions ............................................................................... A-17
A-24 Summary of Move Instructions.................................................................................. A-19
A-25 Summary of Exchange, Push, and Pop Instructions................................................. A-22
A-26 Summary of Bit Instructions.......................................................................................A-23
A-27 Summary of Control Instructions............................................................................... A-24
A-28 Flag Symbols............................................................................................................. A-26
B-1 PLCC/DIP Pin Assignments Listed by Functional Category........................................B-2
B-2 Signal Descriptions......................................................................................................B-3
B-3 Memory Signal Selections (RD1:0) ............................................................................. B-7
C-1 8XC251SA, SB, SP, SQ SFR Map..............................................................................C-2
C-2 Core SFRs...................................................................................................................C-3
C-3 I/O Port SFRs..............................................................................................................C-3