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參數(shù)資料
| 型號： | M38507M8A-XXXSP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PDIP42 |
| 封裝： | 13 X 36.72 MM, 1.78 MM PITCH, PLASTIC, SDIP-42 |
| 文件頁數(shù)： | 89/90頁 |
| 文件大?。?/td> | 899K |
| 代理商： | M38507M8A-XXXSP |
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Rev.2.10
2005.11.14
page 7 of 86
REJ03B0093-0210
3850 Group (Spec.A)
FUNCTIONAL DESCRIPTION
CENTRAL PROCESSING UNIT (CPU)
The 3850 group (spec. A) uses the standard 740 Family instruc-
tion set. Refer to the table of 740 Family addressing modes and
machine instructions or the 740 Family Software Manual for de-
tails on the instruction set.
Machine-resident 740 Family instructions are as follows:
The FST and SLW instructions cannot be used.
The STP, WIT, MUL, and DIV instructions can be used.
[Accumulator (A)]
The accumulator is an 8-bit register. Data operations such as data
transfer, etc., are executed mainly through the accumulator.
[Index Register X (X)]
The index register X is an 8-bit register. In the index addressing
modes, the value of the OPERAND is added to the contents of
register X and specifies the real address.
[Index Register Y (Y)]
The index register Y is an 8-bit register. In partial instruction, the
value of the OPERAND is added to the contents of register Y and
specifies the real address.
[Stack Pointer (S)]
The stack pointer is an 8-bit register used during subroutine calls
and interrupts. This register indicates start address of stored area
(stack) for storing registers during subroutine calls and interrupts.
The low-order 8 bits of the stack address are determined by the
contents of the stack pointer. The high-order 8 bits of the stack ad-
dress are determined by the stack page selection bit. If the stack
page selection bit is “0” , the high-order 8 bits becomes “0016”. If
the stack page selection bit is “1”, the high-order 8 bits becomes
“0116”.
The operations of pushing register contents onto the stack and
popping them from the stack are shown in Figure 6.
Store registers other than those described in Figure 6 with pro-
gram when the user needs them during interrupts or subroutine
calls.
[Program Counter (PC)]
The program counter is a 16-bit counter consisting of two 8-bit
registers PCH and PCL. It is used to indicate the address of the
next instruction to be executed.
Fig. 5 740 Family CPU register structure
A
Accumulator
b7
b0
b7
b15
b0
b7
b0
X
Index register X
Y
Index register Y
S
Stack pointer
PCL
Program counter
PCH
N V T B D I Z C
Processor status register (PS)
Carry flag
Zero flag
Interrupt disable flag
Decimal mode flag
Break flag
Index X mode flag
Overflow flag
Negative flag
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| M38503M4A-XXXFP | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PDSO42 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M3851 BK001 | 制造商:Alpha Wire Company 功能描述:CBL 7COND 14AWG BLK 1000' |
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| M3851 BK005 | 制造商:Alpha Wire Company 功能描述:CBL 7COND 14AWG BLK 100' |
| M38510/00102BCB | 制造商:n/a 功能描述:38510/00102 S6I6B 制造商: 功能描述: 制造商:undefined 功能描述: |
| M38510/00103BCA | 制造商:QP Semiconductor 功能描述:NAND GATE, TRIPLE 3-INPUT |
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