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8XC251SA, SB, SP, SQ USER'S MANUAL
Table
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
xiv
TABLES
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