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EM73P982 bảng dữ liệu(PDF) 7 Page - ELAN Microelectronics Corp

tên linh kiện EM73P982
Giải thích chi tiết về linh kiện  4-BIT MICROCONTROLLER
PDF  41 Pages
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nhà sản xuất  EMC [ELAN Microelectronics Corp]
Trang chủ  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM73P982 bảng dữ liệu(HTML) 7 Page - ELAN Microelectronics Corp

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* This specification are subject to be changed without notice.
EM73P982
EM73P982
EM73P982
EM73P982
EM73P982
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
12.25.2001
HL REGISTER FUNCTION
HL REGISTER FUNCTION
HL REGISTER FUNCTION
HL REGISTER FUNCTION
HL REGISTER FUNCTION
(1) For instruction : LDL #k, LDH #k, THA, THL, INCL, DECL, EXAL, EXAH, HL register used as a
temporary register.
PROGRAM EXAMPLE: Load immediate data "5h" into L register, "Dh" into H register.
LDL #05h;
LDH #0Dh;
(2) For instruction LDAM, STAM, STAMI .., HL register used as a pointer for the address of RAM memory.
PROGRAM EXAMPLE: Store immediate data #Ah into RAM of address 35h.
LDL #5h;
LDH #3h;
STDMI #0Ah; RAM[35]
← Ah, LR←6
(3) For instruction : SELP, CLPL, TFPL, L regieter be a pointer to indicate the bit of I/O port.
When LR = 0 indicate P4.0
PROGRAM EXAMPLE: To set bit 0 of Port4 to "1"
LDL #00h;
SEPL ; P4.0
← 1
STACK POINTER (SP)
STACK POINTER (SP)
STACK POINTER (SP)
STACK POINTER (SP)
STACK POINTER (SP)
Stack pointer is a 4-bit register which stores the present stack level number.
Before using stack, user must set the SP value first, CPU will not initiate the SP value after reset condition.
When a new subroutine is accepted, the SP will be decreased one automatically, in another word, if
returning from a subroutine, the SP will be increased one.
The data transfer between ACC and SP is by instruction of "LDASP" and "STASP" at RAM bank0.
DATA POINTER (DP)
DATA POINTER (DP)
DATA POINTER (DP)
DATA POINTER (DP)
DATA POINTER (DP)
Data pointer is a 12-bit register which stores the address of ROM can indicate the ROM code data
specified by user (refer to data ROM).



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