upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 41
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upd78f0730
Manufacturer Part Number
upd78f0730
Description
8-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0730.pdf
(518 pages)
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3.2.2 General-purpose registers
general-purpose registers consists of 4 banks, each bank consisting of eight 8-bit registers (X, A, C, B, E, D, L, and H).
(AX, BC, DE, and HL).
absolute names (R0 to R7 and RP0 to RP3).
the 4-register bank configuration, an efficient program can be created by switching between a register for normal
processing and a register for interrupts for each bank.
General-purpose registers are mapped at particular addresses (FEE0H to FEFFH) of the data memory. The
Each register can be used as an 8-bit register, and two 8-bit registers can also be used in a pair as a 16-bit register
These registers can be described in terms of function names (X, A, C, B, E, D, L, H, AX, BC, DE, and HL) and
Register banks to be used for instruction execution are set by the CPU control instruction (SEL RBn). Because of
FEFFH
FEF8H
FEF0H
FEE8H
FEE0H
FEFFH
FEF8H
FEF0H
FEE8H
FEE0H
Register bank 0
Register bank 1
Register bank 2
Register bank 3
Register bank 0
Register bank 1
Register bank 2
Register bank 3
Figure 3-8. Configuration of General-Purpose Registers
Preliminary User’s Manual U19014EJ1V0UD
CHAPTER 3 CPU ARCHITECTURE
(a) Function name
(b) Absolute name
15
15
16-bit processing
16-bit processing
RP3
RP2
RP1
RP0
DE
BC
HL
AX
0
0
7
7
8-bit processing
8-bit processing
R7
R6
R5
R4
R3
R2
R1
R0
H
D
E
B
C
A
X
L
0
0
41
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