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HD404612FS Datasheet(PDF) 15 Page - Renesas Technology Corp

Part # HD404612FS
Description  4-Bit Single-Chip Microcomputer
PDF  91 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404612FS Datasheet(HTML) 15 Page - Renesas Technology Corp

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HD404618 Series
13
Functional Description
Registers and Flags
The MCU has ten registers and two flags for CPU operations. They are illustrated in figure 6 and described
below.
30
30
30
30
30
30
0
0
0
13
95
1
V
B
A
W
X
Y
SPX
SPY
CA
ST
PC
SP
11
11
Accumulator
B register
V register
W register
X register
Y register
SPX register
SPY register
Carry flag
Status flag
Program counter
Stack pointer
0
0
0
Figure 6 Registers and Flags
Accumulator (A), B Register (B): Four-bit registers used to hold results from the arithmetic logic unit
(ALU) and transfer data between memory, I/O, and other registers.



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