Electronic Components Datasheet Search |
|
HT83F10 Datasheet(PDF) 7 Page - Holtek Semiconductor Inc |
|
HT83F10 Datasheet(HTML) 7 Page - Holtek Semiconductor Inc |
7 / 62 page HT83FXX Rev. 1.30 7 June 7, 2010 System Architecture A key factor in the high-performance features of the Holtek range of Voice microcontrollers is attributed to the internal system architecture. The range of devices take advantage of the usual features found within RISC microcontrollers providing increased speed of operation and enhanced performance. The pipelining scheme is implemented in such a way that instruction fetching and instruction execution are overlapped, hence instructions are effectively executed in one cycle, with the exception of branch or call instructions. An 8-bit wide ALU is used in practically all operations of the instruction set. It car- ries out arithmetic operations, logic operations, rotation, increment, decrement, branch decisions, etc. The inter- nal data path is simplified by moving data through the Accumulator and the ALU. Certain internal registers are implemented in the Data Memory and can be directly or indirectly addressed. The simple addressing methods of these registers along with additional architectural fea- tures ensure that a minimum of external components is required to provide a functional I/O, voltage type DAC, PWM direct drive output, capacitor/resistor sensor input and external RC oscillator converter with maximum reli- ability and flexibility. Clocking and Pipelining The main system clock, derived from either a Crystal/ Resonator or RC oscillator is subdivided into four inter- nally generated non-overlapping clocks, T1~T4. The Program Counter is incremented at the beginning of the T1 clock during which time a new instruction is fetched. The remaining T2~T4 clocks carry out the decoding and execution functions. In this way, one T1~T4 clock cycle forms one instruction cycle. Although the fetching and execution of instructions takes place in consecutive in- struction cycles, the pipelining structure of the microcontroller ensures that instructions are effectively executed in one instruction cycle. The exception to this are instructions where the contents of the Program Counter are changed, such as subroutine calls or jumps, in which case the instruction will take one more instruction cycle to execute. When the RC oscillator is used, OSC2 can be used used as a T1 phase clock synchronizing pin. This T1 phase clock has a frequency of fSYS/4 with a 1:3 high/low duty cycle. For instructions involving branches, such as jump or call instructions, two machine cycles are required to com- plete instruction execution. An extra cycle is required as the program takes one cycle to first obtain the actual jump or call address and then another cycle to actually execute the branch. The requirement for this extra cycle should be taken into account by programmers in timing sensitive applications. F e t c h I n s t . ( P C ) E x e c u t e I n s t . ( P C - 1 ) F e t c h I n s t . ( P C + 1 ) E x e c u t e I n s t . ( P C ) F e t c h I n s t . ( P C + 2 ) E x e c u t e I n s t . ( P C + 1 ) P C P C + 1 P C + 2 O s c i l l a t o r C l o c k ( S y s t e m C l o c k ) P h a s e C l o c k T 1 P r o g r a m C o u n t e r P h a s e C l o c k T 2 P h a s e C l o c k T 3 P h a s e C l o c k T 4 P i p e l i n i n g System Clocking and Pipelining F e t c h I n s t . 1 E x e c u t e I n s t . 1 F e t c h I n s t . 2 F l u s h P i p e l i n e 1 2 3 4 5 6 D E L A Y : M O V A , [ 1 2 H ] C A L L D E L A Y C P L [ 1 2 H ] : : N O P E x e c u t e I n s t . 2 F e t c h I n s t . 3 F e t c h I n s t . 6 E x e c u t e I n s t . 6 F e t c h I n s t . 7 Instruction Fetching |
Similar Part No. - HT83F10 |
|
Similar Description - HT83F10 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |