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參數(shù)資料
| 型號(hào)： | HT48R05A |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit OTP Microcontroller |
| 中文描述： | 8位微控制器檢察官辦公室 |
| 文件頁(yè)數(shù)： | 6/44頁(yè) |
| 文件大?。?/td> | 294K |
| 代理商： | HT48R05A |
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HT48R05A-1
6
February 25, 2000
Preliminary
Functional Description
Execution flow
The system clock for the microcontroller is de-
rived from either a crystal or an RC oscillator.
The system clock is internally divided into four
non-overlapping clocks. One instruction cycle
consists of four system clock cycles.
Instruction fetching and execution are
pipelined in such a way that a fetch takes an in-
struction cycle while decoding and execution
takes the next instruction cycle. However, the
pipelining scheme causes each instruction to ef-
fectively execute in a cycle. If an instruction
changes the program counter, two cycles are re-
quired to complete the instruction.
Program counter
PC
The program counter (PC) controls the se-
quence in which the instructions stored in pro-
gram PROM are executed and its contents
specify full range of program memory.
After accessing a program memory word to fetch
an instruction code, the contents of the program
counter are incremented by one. The program
counter then points to the memory word contain-
ing the next instruction code.
When executing a jump instruction, conditional
skip execution, loading PCL register, subrou-
tine call, initial reset, internal interrupt, exter-
nal interrupt or return from subroutine, the PC
manipulates the program transfer by loading
the address corresponding to each instruction.
The conditional skip is activated by instruc-
tions. Once the condition is met, the next in-
struction, fetched during the current
instruction execution, is discarded and a
dummy cycle replaces it to get the proper in-
struction. Otherwise proceed with the next in-
struction.
The lower byte of the program counter (PCL) is
a readable and writable register (06H). Moving
data into the PCL performs a short jump. The
destination will be within 256 locations.
When a control transfer takes place, an addi-
tional dummy cycle is required.
Program memory
PROM
The program memory is used to store the pro-
gram instructions which are to be executed. It
also contains data, table, and interrupt entries,
and is organized into 512 14 bits, addressed by
the program counter and table pointer.
6 $ / & 4
7
8
9 $ & - / $7 : 8
6 $ / & 4
7
; 8
9 $ & - / $7 8
6 $ / & 4
7
; 8
9 $ & - / $7 ; 8
;
;
2 % / $ , ( * & <
7 . ( 2 8
Execution flow
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT48R06A-1 | 8-Bit High Performance RISC-like OTP Microcontroller(8位、高性能、類似RISC、一次可編程微控制器，用于多I/O接口設(shè)備) |
| HT48R10A-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
| HT48R10A | 8-BIT MICROCONTROLLER |
| HT48R30A-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
| HT48R30A | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT48R05A-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit OTP Microcontroller |
| HT48R05A-1_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48R062 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48R062_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48R063 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Enhanced I/O Type 8-Bit OTP MCU |
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