參數(shù)資料
型號: μPD784038Y
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位微控制器)
文件頁數(shù): 23/70頁
文件大小: 464K
代理商: ΜPD784038Y
23
m
PD784035Y,784036Y,784037Y,784038Y
6.2 CPU Registers
6.2.1 General-purpose registers
Sixteen 8-bit general-purpose registers are available. Two 8-bit registers can be also used in pairs as a 16-bit
register. Of the 16-bit registers, four can be used in combination with an 8-bit register for address expansion as
24-bit address specification registers.
Eight banks of these registers are available which can be selected by using software or the context switching
function.
The general-purpose registers except V, U, T, and W registers for address expansion are mapped to the internal
RAM.
Figure 6-5. General-Purpose Register Format
A (R1)
B (R3)
R5
R7
R9
R11
D (R13)
H (R15)
V
U
T
W
VVP (RG4)
UUP (RG5)
TDE (RG6)
WHL (RG7)
Parentheses ( ) indicate an absolute name.
X (R0)
C (R2)
R4
R6
R8
R10
E (R12)
L (R14)
AX (RP0)
BC (RP1)
RP2
RP3
VP (RP4)
UP (RP5)
DE (RP6)
HL (RP7)
8 banks
Caution
Registers 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 for recycling
the program of the 78K/III Series.
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