UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 105

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

DE, HL, VVP, UUP, TDE, WHL), each register can also be written by its absolute name (R0 to R15, RP0 to RP7, RG4 to RG7).
The correspondence between these names is shown in Table 3-4.
(a) 8-bit registers
In addition to the function name that emphasizes the specific function of the register (X, A, C, B, E, D, L, H, AX, BC, VP, UP,
Absolute Name
* RSS should only be set to 1 when a 78K/III series program is used.
Remark R8 to R11 have no function name.
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
Table 3-4 Correspondence between Function Names and Absolute Names
RSS = 0
X
A
C
B
E
D
L
H
Function Name
CHAPTER 3 CPU ARCHITECTURE
RSS = 1*
X
A
C
B
E
D
L
H
(b) 16-bit registers
(c) 24-bit registers
Absolute Name
Absolute Name
RG4
RG5
RG6
RG7
RP0
RP1
RP2
RP3
RP4
RP5
RP6
RP7
RSS = 0
BC
UP
DE
AX
VP
HL
Function Name
Function Name
WHL
VVP
UUP
TDE
RSS = 1*
BC
UP
DE
AX
VP
HL
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