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7906 Datasheet(PDF) 23 Page - Renesas Technology Corp

Part # 7906
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  531 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7906 Datasheet(HTML) 23 Page - Renesas Technology Corp

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7906 Group User’s Manual Rev.2.0
CENTRAL PROCESSING UNIT (CPU)
2.1 Central processing unit (CPU)
2-2
2.1 Central processing unit (CPU)
The CPU (Central Processing Unit) has 13 registers shown in Figure 2.1.1.
Fig. 2.1.1 CPU registers
Direct page register 1 (DPR1)
DPR1H
DPR1L
b15b8b7b0
Accumulator B (B)
BH
BL
b15
b8b7b0
Accumulator E (E)
E
b31
b0
Index register X (X)
XH
XL
b15
b8b7b0
Index register Y (Y)
YH
YL
b15
b8b7b0
Stack pointer (S)
SH
SL
b15
b8b7b0
Data bank register (DT)
DT
b7b0
Direct page register 0 (DPR0)
DPR0H
DPR0L
b15b8b7b0
b15
b8 b7
b0
b23
b16
Program counter (PC)
Program bank register (PG)
PCH
PCL
PG
b7
b0
Accumulator A (A)
AH
AL
b15
b8 b7
b0
Direct page register 2 (DPR2)
DPR2H
DPR2L
b15b8b7b0
Direct page register 3 (DPR3)
DPR3H
DPR3L
b15
b8 b7
b0
Processor status register (PS)
PSH
PSL
b15
b8 b7
b0
b0
b1
b2
b3
b4
b5
b6
b7
b8
b10
b15
C
Z
I
D
x
m
V
N
IPL
0
0
0
0
0
Carry flag
Zero flag
Interrupt disable flag
Decimal mode flag
Index register length flag
Data length flag
Overflow flag
Negative flag
Processor interrupt priority level



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