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參數資料
| 型號： | W77E468F-25 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數： | 36/84頁 |
| 文件大小： | 352K |
| 代理商： | W77E468F-25 |
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Preliminary W77E468
- 36 -
Table 3. Instruction Timing for W77E468, continued
Instruction
HEX
Op-Code
Bytes
W77E468
Machine
Cycles
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
2
2
3
W77E468
Clock
cycles
4
4
4
4
4
8
8
4
4
4
4
4
4
4
4
4
4
4
4
8
4
4
4
4
4
4
4
4
4
4
8
8
8
12
8032
Clock
cycles
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
24
W77E468 vs.
8032 Speed
Ratio
3
3
3
3
3
1.5
1.5
3
3
3
3
3
3
3
3
3
3
3
3
1.5
3
3
3
3
3
3
3
3
3
3
1.5
1.5
1.5
2
SUBB A, R5
SUBB A, R6
SUBB A, R7
SUBB A, @R0
SUBB A, @R1
SUBB A, direct
SUBB A, #data
XCH A, R0
XCH A, R1
XCH A, R2
XCH A, R3
XCH A, R4
XCH A, R5
XCH A, R6
XCH A, R7
XCH A, @R0
XCH A, @R1
XCHD A, @R0
XCHD A, @R1
XCH A, direct
XRL A, R0
XRL A, R1
XRL A, R2
XRL A, R3
XRL A, R4
XRL A, R5
XRL A, R6
XRL A, R7
XRL A, @R0
XRL A, @R1
XRL A, direct
XRL A, #data
XRL direct, A
XRL direct, #data
9D
9E
9F
96
97
95
94
C8
C9
CA
CB
CC
CD
CE
CF
C6
C7
D6
D7
C5
68
69
6A
6B
6C
6D
6E
6F
66
67
65
64
62
63
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
2
2
3
INSTRUCTION TIMING
The instruction timing for the W77E468 is an important aspect, especially for those users who wish to
use software instructions to generate timing delays. Also, it provides the user with an insight into the
timing differences between the W77E468 and the standard 8032. In the W77E468 each machine
cycle is four clock periods long. Each clock period is designated a state. Thus each machine cycle is
made up of four states, C1, C2 C3 and C4, in that order. Due to the reduced time for each instruction
execution, both the clock edges are used for internal timing. Hence it is important that the duty cycle
of the clock be as close to 50% as possible to avoid timing conflicts. As mentioned earlier, the
W77E468 does one op-code fetch per machine cycle. Therefore, in most of the instructions, the
number of machine cycles needed to execute the instruction is equal to the number of bytes in the
instruction. Of the 256 available op-codes, 128 of them are single cycle instructions. Thus more than
half of all op-codes in the W77E468 are executed in just four clock periods. Most of the two-cycle
instructions are those that have two byte instruction codes. However there are some instructions that
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PDF描述 |
|---|---|
| W77E468F-40 | 8 BIT MICROCONTROLLER |
| W77E468 | 8 BIT MICROCONTROLLER |
| W77E516 | 8-BIT MICROCONTROLLER |
| W77E516-25 | 8-BIT MICROCONTROLLER |
| W77E516-40 | 8-BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W77E468F-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E516 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E516-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E516-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E516A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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