參數(shù)資料
型號(hào)： HT86070
廠商： Holtek Semiconductor Inc.
英文描述： Voice Synthesizer 8-Bit MCU
中文描述： 語(yǔ)音合成器8位微控制器
文件頁(yè)數(shù)： 8/40頁(yè)
文件大小： 256K
代理商： HT86070
HT86030/HT86070
Rev. 1.10
8
May 25, 2006
Functional Description
Execution Flow
The system clock for the HT86030/HT86070 series is
derived from either a crystal or an RC oscillator. It is in-
ternally 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 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 13-bit program counter (PC) controls the sequence
in which the instructions stored in program ROM are ex-
ecuted.
After accessing a program memory word to fetch an in-
struction code, the contents of the program counter are
incremented by one. The program counter then points
to 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.
Mode
Program Counter
*12
*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
0
External or Serial Input Interrupt
0
0
0
0
0
0
0
0
0
0
1
0
0
Timer/EventCounter0Overflow
0
0
0
0
0
0
0
0
0
1
0
0
0
Timer/EventCounter1Overflow
0
0
0
0
0
0
0
0
0
1
1
0
0
Timer Counter 3 Overflow
0
0
0
0
0
0
0
0
1
0
1
0
0
Skip
Program Counter+2
Loading PCL
*12
*11
*10
*9
*8
@7
@6
@5
@4
@3
@2
@1
@0
Jump, Call Branch
#12
#11
#10
#9
#8
#7
#6
#5
#4
#3
#2
#1
#0
Program Counter
Note: *12~*0: Program counter bits
S12~S0: Stack register bits
#12~#0: Instruction code bits
@7~@0: PCL bits
0
*
0
*
0
*
:
$ '
' 7
9
@
'
' 7
5 9
:
$ '
' 7
A
9
@
'
' 7
9
:
$ '
' 7
A
9
@
'
' 7
A
9
A
A
"
'
,
>
' 7
'
, " 9
0
*
,
$
,
>
Execution Flow
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