參數(shù)資料
型號: PD784054GCA2
廠商: NEC Corp.
英文描述: 16-BIT SINGLE-CHIP MICROCONTROLLER
中文描述: 16位單片機
文件頁數(shù): 20/86頁
文件大?。?/td> 579K
代理商: PD784054GCA2
μ
PD784054(A)
20
6.2 CPU Registers
6.2.1 General-purpose registers
Sixteen 8-bit general-purpose registers are provided. Two 8-bit general-purpose registers can be used in
pairs as a 16-bit general-purpose register. Of the 16-bit registers, four can be used with an 8-bit register for
address expansion as 24-bit address specification registers.
Eight banks of register sets are available which can be selected by software or context switching function.
The general-purpose registers except the V, U, T, and W registers for address expansion are mapped to the
internal RAM.
Figure 6-2. General-Purpose Register Format
V
U
T
W
A(R1)
B(R3)
R5
R7
R9
R11
D(R13)
H(R15)
R8
R10
E(R12)
L(R14)
VVP(RG4)
UUP(RG5)
TDE(RG6)
WHL(RG7)
X(R0)
C(R2)
R4
R6
VP(RP4)
UP(RP5)
DE(RP6)
HL(RP7)
AX(RP0)
BC(RP1)
RP2
RP3
( ): absolute name
8 banks
Caution
R4, R5, R6, R7, RP2, and RP3 can be used as X, A, C, B, AX, and BC registers, respectively, by
setting the RSS bit of the PSW to 1. However, use this function only when using a 78K/III series
program.
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