參數(shù)資料
型號: UPD784218YGC
廠商: NEC Corp.
英文描述: Cable; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No
中文描述: 16-/8-bit的單晶片微控制器
文件頁數(shù): 24/92頁
文件大小: 617K
代理商: UPD784218YGC
μ
PD784218, 784218Y
Data Sheet U12304EJ2V0DS00
24
7.2 CPU Registers
7.2.1 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 register sets are available and can be selected by using software or the 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 7-2. General-Purpose Register Format
Caution
Registers R4, R5, R6, R7, RP2, and RP3 can be used as the 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.
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
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