參數(shù)資料
型號： HT82K68E-L
廠商： Holtek Semiconductor Inc.
英文描述： Multimedia Keyboard Encoder 8-Bit MCU
中文描述： 多媒體鍵盤編碼器8位微控制器
文件頁數(shù)： 6/39頁
文件大?。?/td> 269K
代理商： HT82K68E-L
Mode
Program Counter
11
10
9
8
7
6
5
4
3
2
1
0
Initial reset
0
0
0
0
0
0
0
0
0
0
0
0
External interrupt
0
0
0
0
0
0
0
0
0
1
0
0
Timer counter overflow
0
0
0
0
0
0
0
0
1
0
0
0
Skip
Program Counter+2
Loading PCL
11
10
9
8
@7
@6
@5
@4
@3
@2
@1
@0
Jump, call branch
#11
#10
#9
#8
#7
#6
#5
#4
#3
#2
#1
#0
Return from subroutine
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
S0
HT82K68E-L/HT82K68A-L
Rev. 1.00
6
August 9, 2007
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Execution Flow
Functional Description
Execution Flow
The device system clock is derived from either a crystal
or an RC oscillator. The system clock is internally di-
vided 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 one instruction cycle while de-
coding and execution takes the next instruction cycle.
However, the pipelining scheme causes each instruc-
tion to effectively execute within one cycle. If an instruc-
tion changes the program counter, two cycles are
required to complete the instruction.
Program Counter
PC
The 12-bit program counter (PC) controls the sequence
in which the instructions stored in the program ROM are
executed and its contents specify a maximum of 4096
addresses.
After accessing a program memory word to fetch an in-
struction code, the contents of the program counter are
incrementedbyone.Theprogramcounterthenpointsto
the memory word containing the next instruction code.
When executing a jump instruction, conditional skip ex-
ecution, loading PCL register, subroutine call, initial re-
set, internal interrupt, external 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 instruction. Once the
condition is met, the next instruction, fetched during the
current instruction execution, is discarded and a dummy
cycle replaces it to get the proper instruction. Otherwise
proceed with the next instruction.
The lower byte of the program counter (PCL) is a read-
able and writeable register (06H). Moving data into the
PCLperformsashortjump.Thedestinationwillbewithin
256locations.
Once a control transfer takes place, an additional
dummy cycle is required.
Program Memory
ROM
The program memory is used to store the program in-
structions which are to be executed. It also contains
data, table, and interrupt entries, and is organized with
3072 16bits,addressedbytheprogramcounterandta-
ble pointer.
Note: *11~*0: Program counter bits
#11~#0: Instruction code bits
S11~S0: Stack register bits
@7~@0: PCL bits
相關(guān)PDF資料
PDF描述
HT82K68A 8-Bit High Performance Peripheral Interface IC For Multiple I/O Products and Multimedia Applications(8位高性能外圍接口集成芯片，用于多I/O口及多媒體器件)
HT82K68E 8-Bit High Performance Peripheral Interface IC For Multiple I/O Products and Multimedia Applications(8位高性能外圍接口集成芯片，用于多I/O口及多媒體器件)
HT82K68 Multimedia Keyboard Encoder OTP
HT82K94A USB Multimedia Keyboard Encoder 8-Bit MCU
HT82K94E USB Multimedia Keyboard Encoder 8-Bit MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HT82K68E-L_09 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Multimedia Keyboard Encoder 8-Bit MCU
HT82K68E-L_11 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Multimedia Keyboard Encoder 8-Bit MCU
HT82K70A-L 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type 8-Bit MCU
HT82K70E-L 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type 8-Bit OTP MCU
HT82K70E-L_11 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type 8-Bit MCU
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