DS89C420-QCL Datasheet, PDF (57/139 Pages) Maxim Integrated Products – Ultra-High-Speed Flash Microcontroller User’s Guide

Ultra-High-Speed Flash
Microcontroller User’s Guide
INSTRUCTION
CJNE A, #data, rel
CJNE Rn, #data, rel
CJNE @Ri, #data, rel
DJNZ Rn, rel
DJNZ direct, rel
NOP
HEX
CODE
B4
B8..BF
B6..B7
D8..DF
D5
00
UHSM
CLOCK
CYCLES
4
4
5
4
5
1
UHSM
TIME
@ 25MHz
160 ns
160 ns
200 ns
160 ns
200 ns
40 ns
8051
CLOCK
CYCLES
24
24
24
24
24
12
8051
TIME
@ 25MHz
960 ns
960 ns
960 ns
960 ns
960 ns
480 ns
UHSM vs.
8051 SPEED
ADVANTAGE
6
6
4.8
6
4.8
12
Table 5-2. INSTRUCTION SPEED SUMMARY
INSTRUCTION CATEGORY
Total instructions: 1 byte
Total instructions: 2 byte
Total instructions: 3 byte
Average across all instructions
OPCODE CATEGORY
Total opcodes: 1 byte
Total opcodes: 2 byte
Total opcodes: 3 byte
Average across all opcodes
SPEED
ADVANTAGE
4.0
4.8
5.3
6.0
8.0
12.0
24.0
4.0
6.0
8.0
12.0
4.8
6.0
8.0
8.5
SPEED
ADVANTAGE
4.0
4.8
5.3
6.0
8.0
12.0
24.0
4.0
6.0
8.0
12.0
4.8
6.0
8.0
9.4
QUANTITY
2
1
1
12
5
27
1
1
27
5
13
3
5
8
111
QUANTITY
4
1
1
35
5
93
1
1
42
5
43
4
12
8
255
57 _____________________________________________________________________________________________