
Section 2 CPU
Rev. 6.00 Sep 12, 2006 page 15 of 526
REJ09B0326-0600
Section 2 CPU
2.1 Overview
The H8/300L CPU has sixteen 8-bit general registers, which can also be paired as eight 16-bit
registers. Its concise instruction set is designed for high-speed operation.
2.1.1 Features
Features of the H8/300L CPU are listed below.
•
General-register architecture
Sixteen 8-bit general registers, also usable as eight 16-bit general registers
•
Instruction set with 55 basic instructions, including:
Multiply and divide instructions
Powerful bit-manipulation instructions
•
Eight addressing modes
Register direct
Register indirect
Register indirect with displacement
Register indirect with post-increment or pre-decrement
Absolute address
Immediate
Program-counter relative
Memory indirect
•
64-kbyte address space
•
High-speed operation
All frequently used instructions are executed in two to four states
High-speed arithmetic and logic operations
8- or 16-bit register-register add or subtract: 0.4 µs (operating at
φ
= 5 MHz)
0.25 µs (operating at
φ
= 8 MHz)*
8
×
8-bit multiply:
2.8 µs (operating at
φ
= 5 MHz)
1.75 µs (operating at
φ
= 8 MHz)*
16 ÷ 8-bit divide:
2.8 µs (operating at
φ
= 5 MHz)
1.75 µs (operating at
φ
= 8 MHz)*
Note: * Applies only to F-ZTAT, R of the ZTAT, and R of the mask ROM version.
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...