參數(shù)資料
型號(hào)： HT82A850R
廠商： Holtek Semiconductor Inc.
英文描述： Audio MCU
中文描述： 音頻控制器
文件頁(yè)數(shù)： 8/41頁(yè)
文件大?。?/td> 296K
代理商： HT82A850R
HT82A850R
Rev. 1.10
8
July 25, 2007
prior to the table read instruction. It should not be
re-enabled until TBLH has been backed up.
All table related instructions require two cycles to
complete the operation. These areas may function as
normal program memory depending upon require-
ments.
Stack Register
STACK
This is a special part of the memory which is used to
save the contents of the program counter only. The
stackisorganisedinto16levelsandisneitherpartofthe
data nor part of the program space, and is neither read-
able nor writeable. The activated level is indexed by the
stack pointer, SP, which is neither readable nor
writeable. At a subroutine call or interrupt acknowledge
signal, the contents of the program counter are pushed
onto the stack. At the end of a subroutine or an interrupt
routine, signaled by a return instruction, RET or RETI,
the program counter is restored to its previous value
from the stack. After a chip reset, the SP will point to the
top of the stack.
If the stack is full and a non-masked interrupt takes
place, the interrupt request flag will be recorded but the
acknowledge signal will be inhibited. When the stack
pointer is decremented, using RET or RETI, the inter-
rupt will be serviced. This feature prevents a stack over-
flow allowing the programmer to use the structure more
easily. In a similar case, if the stack is full and a CALL
is subsequently executed, a stack overflow will occur
andthefirstentrywillbelost.Onlythemostrecent16re-
turn addresses are stored.
Data Memory
The data memory is divided into two functional groups.
These are the special function registers and the general
purpose data memory in Bank0 and Bank1: 384 8 bits.
Most are read/write, but some are read only. The special
function registers are overlapped in all banks.
Any unused space before 40H is reserved for future ex-
panded usage and if read will return a value of 00H .
Thegeneralpurposedatamemory,addressedfrom40H
toFFH,isusedfordataandcontrolinformationunderin-
struction commands.
All data memory areas can handle arithmetic, logical, in-
crement, decrement and rotate operations directly. Ex-
cept for some dedicated bits, each bit in the data
memory can be set and reset by SET [m].i and CLR
[m].i . They are also indirectly accessible through the
memory pointer registers, MP0 or MP1.
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RAM Mapping
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HT82A851R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU
HT82B40A 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B40R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B40R_11 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B42R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
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