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參數(shù)資料
| 型號： | uPSD3233 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器) |
| 中文描述： | 閃存可編程系統(tǒng)器件與8032微控制器內(nèi)核（嵌入高速“8032微控制器核”的閃存型可編程系統(tǒng)器） |
| 文件頁數(shù)： | 24/164頁 |
| 文件大?。?/td> | 1133K |
| 代理商： | UPSD3233 |
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μ
PSD3200 FAMILY
24/164
DRAFT(Thursday 20 June 2002, 13:15).
(continue)
The CJNE instruction (Compare and Jump if Not
Equal) can also be used for loop control as in Ta-
ble 9. Two bytes are specified in the operand field
of the instruction. The jump is executed only if the
two bytes are not equal. In the example of Table 9
Shifting a BCD Number One Digits to the Right,
the two bytes were data in R1 and the constant
2Ah. The initial data in R1 was 2Eh.
Every timethe loop was executed, R1 was decre-
mented, and the looping was to continue until the
R1 data reached 2Ah.
Another application of this instruction is in “greater
than, less than” comparisons. The two bytes in the
operand fieldare taken as unsigned integers.If the
first is less than the second, then the Carry bit is
set (1). If the first is greater than or equal to the
second, then the Carry bit is cleared
Machine Cycles
A machine cycle consists of a sequence of six
states, numbered S1 through S6. One machine
cycle period vary according to the SC-MOD regis-
ter value. Refer to Figure 13
Each state is divided into a Phase 1 half and a
Phase 2 half. State Sequence in
μ
PSD3200 Fam-
ily Devices shows that fetch/execute sequences in
states and phases forvarious kinds of instructions.
Normally two program fetches are generated dur-
ing each machine cycle, even if theinstruction be-
ing executed does not require it. If the instruction
being executed does not need more code bytes,
the CPU simply ignores the extra fetch, and the
Program Counter is not incremented.
Execution of a one-cycle instruction (Figure 13)
begins during State 1 of the machine cycle, when
the opcode is latched into the Instruction Register.
A second fetch occurs during S4 of the same ma-
chine cycle. Execution is complete at the end of
State 6 of this machine cycle.
The MOVX instructions take two machine cycles
to execute. No program fetch is generated during
the secondcycle of a MOVX instruction. Thisis the
only time program fetches are skipped. The fetch/
execute sequence for MOVX instruction is shown
in Figure 13 (d).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| uPSD3234(中文) | Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器) |
| uPSD3212C(中文) | Flash Programmable System Devices with 8032 Microcontroller Core and 16Kbit SRAM(帶8032微控制器內(nèi)核和16Kbit SRAM的FLASH可編程系統(tǒng)器件) |
| uPSD3254A(中文) | Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的FLASH可編程系統(tǒng)器件) |
| uPSD3254BV(中文) | Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的FLASH可編程系統(tǒng)器件) |
| UPSD3234A | Flash Programmable System Devices with 8032 Microcontroller Core |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPSD3233A-24T1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3233A-24T1T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core |
| UPSD3233A-24T6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3233A-24T6T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core |
| UPSD3233A-24U1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
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