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HD404369F Scheda tecnica(PDF) 16 Page - Renesas Technology Corp

Il numero della parte HD404369F
Spiegazioni elettronici  microcomputer has an A/D converter
PDF  117 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404369F Scheda tecnica(HTML) 16 Page - Renesas Technology Corp

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HD404369 Series
14
Functional Description
Registers and Flags
The MCU has nine registers and two flags for CPU operations. They are shown in figure 7 and described
below.
30
30
30
30
30
30
0
0
0
13
95
1
(B)
(A)
(W)
(X)
(Y)
(SPX)
(SPY)
(CA)
(ST)
(PC)
(SP)
11
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
0
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: 1, no R/W
Figure 7 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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