參數(shù)資料
型號： HD404449H
元件分類： 微控制器/微處理器
英文描述： MROM, MICROCONTROLLER, PQFP80
封裝： PLASTIC, QFP-80
文件頁數(shù)： 7/33頁
文件大?。?/td> 440K
代理商： HD404449H
HD404449 Series
13
Functional Description
Registers and Flags
The MCU has nine registers and two flags for CPU operations. They are shown in figure 8 and described
below.
30
0
13
95
1
(B)
(A)
(W)
(X)
(Y)
(SPX)
(SPY)
(CA)
(ST)
(PC)
(SP)
11
Accumulator
B register
W register
X register
Y register
SPX register
SPY register
Carry
Status
Program counter
Initial value: 0,
no R/W
Stack pointer
Initial value: $3FF, no R/W
0
Initial value: Undefined, R/W
Initial value: 1, no R/W
Figure 8 Registers and Flags
Accumulator (A), B Register (B): Four-bit registers used to hold the results from the arithmetic logic unit
(ALU) and transfer data between memory, I/O, and other registers.
W Register (W), X Register (X), Y Register (Y): Two-bit (W) and four-bit (X and Y) registers used for
indirect RAM addressing. The Y register is also used for D-port addressing.
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PDF描述
HD4074008F 4-BIT, OTPROM, 9 MHz, MICROCONTROLLER, PQFP64
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404449SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
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HD404458 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers
HD404458H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers
HD404459 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers
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