UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 68
UPD78F0988AGC-8BS
Manufacturer Part Number
UPD78F0988AGC-8BS
Description
Manufacturer
Renesas Electronics America
Datasheet
1.UPD78F0988AGC-8BS.pdf
(431 pages)
Specifications of UPD78F0988AGC-8BS
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3.2.2 General-purpose registers
of general-purpose registers, each consisting of eight 8-bit registers (X, A, C, B, E, D, L, and H) are available.
(AX, BC, DE, and HL).
by an absolute name (R0 to R7, RP0 to RP3).
register banks are provided, an efficient program can be developed by using one register bank for ordinary processing
and another bank for interrupt servicing.
66
Bank Name
General-purpose registers are mapped to specific addresses of the data memory (FEE0H to FEFFH). Four banks
Each register can be used as an 8-bit register. Moreover, 8-bit registers can be used in pairs as 16-bit registers
Each register can be described not only by a function name (X, A, C, B, E, D, L, H, AX, BC, DE, or HL) but also
The register bank used for instruction execution is set by the CPU control instruction (SEL RBn). Because four
BANK0
BANK1
Function
Name
H
D
C
H
D
C
L
E
B
A
X
L
E
B
A
X
Table 3-3. Absolute Addresses of General-Purpose Registers
Register
Absolute
Name
R7
R6
R5
R4
R3
R2
R1
R0
R7
R6
R5
R4
R3
R2
R1
R0
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U13029EJ7V1UD
Absolute
Address
FEFEH
FEFDH
FEFCH
FEFBH
FEFAH
FEFFH
FEF9H
FEF8H
FEF7H
FEF6H
FEF5H
FEF4H
FEF3H
FEF2H
FEF1H
FEF0H
Bank Name
BANK2
BANK3
Function
Name
H
D
E
B
C
A
X
H
D
E
B
C
A
X
L
L
Register
Absolute
Name
R7
R6
R5
R4
R3
R2
R1
R0
R7
R6
R5
R4
R3
R2
R1
R0
Absolute
Address
FEEDH
FEECH
FEEFH
FEEEH
FEEBH
FEEAH
FEE9H
FEE8H
FEE7H
FEE6H
FEE5H
FEE4H
FEE3H
FEE2H
FEE1H
FEE0H
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