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參數資料
| 型號： | HT82M99E |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | USB Mouse Encoder 8-Bit OTP MCU |
| 中文描述： | USB鼠標編碼器8位微控制器檢察官辦公室 |
| 文件頁數： | 6/45頁 |
| 文件大小： | 646K |
| 代理商： | HT82M99E |
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HT82M99E
Rev. 1.50
6
November 19, 2004
Stack Register
STACK
This is a special part of the memory which is used to
save the contents of the program counter (PC) only. The
stack is organized into 4 levels and is neither part of the
data nor part of the program space, and is neither read-
able nor writeable. The activated level is indexed by the
stack pointer (SP) and 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 pro-
gram counter is restored to its previous value from the
stack.Afterachipreset,theSPwillpointtothetopofthe
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 (by RET or RETI), the interrupt
will be serviced. This feature prevents stack overflow al-
lowing the programmer to use the structure more easily.
In a similar case, if the stack is full and a CALL is sub-
sequently executed, stack overflow occurs and the first
entry will be lost (only the most recent 4 return ad-
dresses are stored).
Data Memory
RAM for Bank 0
The data memory is designed with 96 8 bits. The data
memory is divided into two functional groups: special
function registers and general purpose data memory
(96 8). Most are read/write, but some are read only.
The special function registers include the indirect ad-
dressing registers (R0;00H, R1;02H), Bank register (BP,
04H), Timer/Event Counter higher order byte register
(TMRH;0FH), Timer/Event Counter lower order byte
register (TMRL;10H), Timer/Event Counter control reg-
ister (TMRC;11H), program counter lower-order byte
register (PCL;06H), memory pointer registers
(MP0;01H, MP1;03H), accumulator (ACC;05H), table
pointers (TBLP;07H, TBHP;1FH), table higher-order
byte
register
(TBLH;08H),
(STATUS;0AH), interrupt control register (INTC;0BH),
Watchdog Timer option setting register (WDTS;09H),
I/O registers (PA;12H, PB;14H), I/O control registers
(PAC;13H, PBC;15H). USB/PS2 status and control reg-
ister (USC;1AH), USB endpoint interrupt status register
(USR;1BH), system clock control register (SCC;1CH).
The remaining space before the 20H is reserved for fu-
ture expanded usage and reading these locations will
status
register
get
dressed from 20H to 7FH, is used for data and control
information under instruction commands.
00H . The general purpose data memory, ad-
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).
3 3
3
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3 2
3 *
3 9
3 5
3 .
3 8
3 7
3
3 -
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3
3
3 ;
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Bank 0 RAM Mapping
相關PDF資料 |
PDF描述 |
|---|---|
| HT82M99E-18 | USB Mouse Encoder 8-Bit OTP MCU |
| HT82M99E-20 | USB Mouse Encoder 8-Bit OTP MCU |
| HT82M9AAE | USB Mouse Encoder 8-Bit MCU with EEPROM |
| HT82M9AEE | USB Mouse Encoder 8-Bit MCU with EEPROM |
| HT82M9BAE | USB Mouse Encoder 8-Bit MCU with EEPROM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT82M99E_11 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU |
| HT82M99E-18 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit OTP MCU |
| HT82M99E-20 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit OTP MCU |
| HT82M99EE | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU |
| HT82M99EE_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Mouse Encoder 8-Bit MCU |
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