UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 101
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UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
- Current page: 101 of 759
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3.8 GENERAL-PURPOSE REGISTERS
3.8.1 Configuration
general-purpose register. In addition, four of the 16-bit general-purpose registers can be combined with an 8-bit register for
address extension, and used as 24-bit address specification registers.
the register bank selection flag (RBS0, RBS1, RBS2) in the PSW.
There are sixteen 8-bit general-purpose registers, and two 8-bit general-purpose registers can be used together as a 16-bit
General-purpose registers other than the V, U, T and W registers for address extension are mapped onto internal RAM.
These register sets are provided in 8 banks, and can be switched by means of software or the context switching function.
Upon RESET input, register bank 0 is selected. The register bank used during program execution can be checked by reading
Remark Absolute names are shown in parentheses.
23
W
U
V
T
Figure 3-12 General-Purpose Register Format
UUP (RG5)
WHL (RG7)
VVP (RG4)
TDE (RG6)
15
7
CHAPTER 3 CPU ARCHITECTURE
D (R13)
H (R15)
B (R3)
A(R1)
R11
R5
R7
R9
BC (RP1)
VP (RP4)
UP (RP5)
DE (RP6)
HL (RP7)
AX(RP0)
RP2
RP3
0 7
E (R12)
L (R14)
C (R2)
X(R0)
R10
R4
R6
R8
0
0
8 Banks
61
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