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UPD784938 Datasheet(PDF) 96 Page - NEC

Part # UPD784938
Description  16-Bit Single-Chip Microcontrollers
Download  733 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD784938 Datasheet(HTML) 96 Page - NEC

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96
CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U13987EJ1V0UM00
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,
DE, HL, VVP, UUP, TDE, WHL), each register can also be described by its absolute name (R0 to R15, RP0 to RP7, RG4 to RG7).
The correspondence between these names is shown in Table 3-5.
Table 3-5. Correspondence between Function Names and Absolute Names
Note RSS should only be set to 1 when a 78K/III Series program is used.
Remark
R8 to R11 have no function name.
(b) 16-bit registers
Absolute Name
Function Name
RSS = 0
RSS = 1Note
RP0
AX
RP1
BC
RP2
AX
RP3
BC
RP4
VP
VP
RP5
UP
UP
RP6
DE
DE
RP7
HL
HL
(c) 24-bit registers
Absolute Name
Function Name
RG4
VVP
RG5
UUP
RG6
TDE
RG7
WHL
(a) 8-bit registers
Absolute Name
Function Name
RSS = 0
RSS = 1Note
R0
X
R1
A
R2
C
R3
B
R4
X
R5
A
R6
C
R7
B
R8
R9
R10
R11
R12
E
E
R13
D
D
R14
L
L
R15
H
H


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