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參數(shù)資料
| 型號： | HMS38112 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 4-BIT SINGLE CHIP MICROCOMPUTERS |
| 中文描述： | 4位單片機微機 |
| 文件頁數(shù)： | 32/73頁 |
| 文件大?。?/td> | 505K |
| 代理商： | HMS38112 |
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3-4
Accumulator (A
CC
)
The 4-bit register for holding data and calculation results.
Arithmetic and Logic Unit (ALU)
In this unit, 4bits of adder/comparator are connected in parallel as it's main
components and they are combined with status latch and status logic (flag.)
(1) Operation circuit (ALU) :
The adder/comparator serves fundamentally for full addition and data
comparison. It executes subtraction by making a complement by processing
an inversed output of A
CC
(A
CC
+1)
(2) Status logic :
This is to bring an ST, or flag to control the flow of a program. It occurs when
a specified instruction is executed in three cases such as overflow or underflow
in operation and two inputs unequal.
State Counter (SC)
A fundamental machine cycle timing chart is shown below. Every instruction is
one byte length. Its execution time is the same. Execution of one instruction
takes 6 clocks for fetch cycle and 6 clocks for execute cycle (12 clocks in total).
Virtually these two cycles proceed simultaneously, and thus it is apparently
completed in 6 clocks (one machine cycle). Exceptionally BR, CAL and RTN
instructions is normal execution time since they change an addressing sequentially.
Therefore, the next instruction is prefetched so that its execution is completed
within the fetch cycle.
Chapter 3. Architecture
Fig. 3-3 Fundamental timing chart
T1 T2 T3 T4 T5 T6 T1 T2 T3 T4 T5 T6
Fetch cycle N
Execute cycle N-1
Execute cycle N
Fetch cycle N-1
Phase
é
Phase
ê
Phase
Machine
Cycle
Machine
Cycle
相關PDF資料 |
PDF描述 |
|---|---|
| HMS39112 | 4-BIT SINGLE CHIP MICROCOMPUTERS |
| HMS39C70512 | [ARM7 Core Base Solution Product] |
| HMS39C7092 | MMBTA42, 300V, 0.5A, 300MW, SOT-23 |
| HMS77C2000 | [General Purpose(2) : ADC/ LED/ SCI/ PWM] |
| HMS77C2001 | [General Purpose(2) : ADC/ LED/ SCI/ PWM] |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HMS38T2564 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32bit CPU, 64Kbyte EEPROM, 256Kbyte ROM, 8Kbyte RAM |
| HMS39112 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-BIT SINGLE CHIP MICROCOMPUTERS |
| HMS39C70512 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:[ARM7 Core Base Solution Product] |
| HMS39C7092 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:Embedded Flash MCU |
| HMS3S800 | 制造商:Siemens 功能描述: |
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