參數(shù)資料
型號： HT95A100
廠商： Holtek Semiconductor Inc.
英文描述： I/O Type Phone 8-Bit MCU
中文描述： I / O型電話8位微控制器
文件頁數(shù)： 8/48頁
文件大?。?/td> 360K
代理商： HT95A100
HT95AXXX
Rev. 1.20
8
May 26, 2004
ISR (Interrupt Service Routine) both employ the table
read instruction, the contents of the TBLH in the main
routine are likely to be changed by the table read in-
struction used in the ISR. Errors will then occur. Hence,
simultaneously using the table read instruction in the
mainroutineandtheISRshouldbeavoided.However,if
the table read instruction has to be applied in both the
main routine and the ISR, the interrupt should be dis-
abled prior to the table read instruction. It will not be en-
abled until the TBLH has been backed-up. All table
related instructions require two cycles to complete the
operation. These areas may function as normal pro-
gram memory depending on the requirements.
Stack Register
This is a special part of the memory which is used to
save the contents of the program counter only. The
stack is organized into 12 levels (HT95A400/40P), 8 lev-
els (HT95A300/30P, HT95A200/20P) or 4 levels
(HT95A100/10P) and is neither part of the data nor part
of the program space, and is neither readable nor
writable. The activated level is indexed by the stack
pointer (SP) and is neither readable nor writable. At a
subroutine call or interrupt acknowledge signal, the con-
tents of the program counter are pushed onto the stack.
At the end of a subroutine or an interrupt routine, sig-
naled by a return instruction (RETor RETI), the program
counter is restored to its previous value from the stack.
Afterachipreset,theSPwillpointtothetopofthestack.
If the stack is full and an interrupt takes place, the inter-
rupt request flag will be recorded but the acknowledge
signal will be inhibited even if this interrupt is enabled.
When the stack pointer is decremented (by RET or
RETI), the interrupt will be serviced. This feature pre-
ventsstackoverflowallowingtheprogrammertousethe
structure more easily. If the stack is full and a CALL is
subsequently executed, stack overflow occurs and the
first entry will be lost (only the most recent 12, 8 or 4, de-
pending on various MCU type, returned addresses are
stored).
Data Memory
The data memory is divided into three functional groups:
special function registers, embedded control register
and general purpose memory. Most are read/write, but
some are read only.
The special function registers are located from 00H to
1FH. The embedded control registers are located in the
memory areas from 20H to 3FH. The remaining spaces
which are not specified in the following table before the
40H are reserved for future expanded usage and read-
ing these locations will get 00H . The general purpose
data memory is divided into 15 banks (HT95A400/40P),
11banks(HT95A300/30P),6banks(HT95A200/20P)or
2 banks (HT95A100/10P). The banks in the RAM are all
addressed from 40H to 0FFH and they are selected by
setting the value of the Bank Pointer (BP).
All of the data memory areas can handle arithmetic,
logic, increment, decrement and rotate operations di-
rectly. Except 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
memory pointer registers (MP0 or MP1). The
bank1~bank14 are only indirectly accessible through
memory pointer 1 register (MP1).
HT95A400/40P
Instruction(s)
Table Location
*13
*12
*11
*10
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
TABRDC [m]
#5
#4
#3
#2
#1
#0
@7
@6
@5
@4
@3
@2
@1
@0
TABRDL [m]
1
1
1
1
1
1
@7
@6
@5
@4
@3
@2
@1
@0
HT95A300/30P
Instruction(s)
Table Location
*12
*11
*10
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
TABRDC [m]
P12
P11
P10
P9
P8
@7
@6
@5
@4
@3
@2
@1
@0
TABRDL [m]
1
1
1
1
1
@7
@6
@5
@4
@3
@2
@1
@0
HT95A200/20P, HT95A100/10P
Instruction(s)
Table Location
*11
*10
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
TABRDC [m]
P11
P10
P9
P8
@7
@6
@5
@4
@3
@2
@1
@0
TABRDL [m]
1
1
1
1
@7
@6
@5
@4
@3
@2
@1
@0
Note: *13~*0: Table location bits
#7~#0: TBHP register bit7~bit0
@7~@0: TBLP register bit7~bit0
P12~P8: Current program counter bits
相關(guān)PDF資料
PDF描述
HT95A200 I/O Type Phone 8-Bit MCU
HT95A300 I/O Type Phone 8-Bit MCU
HT95AXXX I/O Type Phone 8-Bit MCU
HT95C20P 8-Bit CID Type Phone Controller MCU
HT95C300 8-Bit CID Type Phone Controller MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HT95A100/10P 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type Phone 8-Bit MCU
HT95A10P 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type Phone 8-Bit MCU
HT95A200 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type Phone 8-Bit MCU
HT95A200/20P 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type Phone 8-Bit MCU
HT95A20P 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU
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