dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 4

• Manufacturer Part Number: dp8344b
• Description: Biphase Communications Processor?bcp
• Manufacturer: National Semiconductor Corporation

Block Diagram of Typical BCP System
Biphase Encoding
IBM 3270 Message Format
Simplified Block Diagram
Memory Configuration
Effect of Memory Wait States on Timing
Register to Register Internal Data Flow
Data Memory WRITE Data Flow
Data Memory READ Data Flow
WRITE to Transmitter Data Flow
READ from Receiver Data Flow
Load Immediate Data Data Flow
Basic Remote Interface
Register Map
Timer Block Diagram
Timer Interrupt Diagram
Index Register Map
Coding Examples of Equivalent Conditional Jump Instructions
JRMK Instruction Example
Condition Code Register ALU Flags
Carry and Overflow Calculations
Shifts’ Effect on Carry
Rotates’ Effect on Carry
Multi-Byte Arithmetic Instruction Sequences
CPU-CLK Synchronization with X1
Changing from OCLK 2 to OCLK
Two T-state Instruction
Three T-state Instruction
Three T-state Data Memory Write Instruction
Three T-state Data Memory Read Instruction
Four T-state Data Memory Read Instruction
Four T-state Program Control Instruction
Four T-state Two Word Instruction
Data Memory Write with One Wait State
Data Memory Read with One Wait State
Data Memory Read with Two Wait States
Two T-state Instruction with Two Wait States
Four T-state Instruction with One Wait State
Data Memory Access Wait Timing
Two T-state Instruction WAIT Timing
Three T-state Program Control Instruction WAIT Timing
Four T-state Program Control Instruction WAIT Timing
LOCK Timing
LOCK Timing with One Wait State
CPU Start-Up Timing
Functional State Diagram of CPU Timing
Interrupt Timing
DP8344B Operation with Crystal
DP8344B Operation with External Clock
List of Illustrations
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