參數(shù)資料
型號: μPD789198
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 19/146頁
文件大小: 630K
代理商: ΜPD789198
Preliminary Product Information
19
μ
PD789186, 789187, 789196, 789197
4.3.2
General-purpose registers
Each device has eight 8-bit general-purpose registers (X, A, C, B, E, D, L, and H).
These registers can be used as 16-bit registers (two 8-bit registers used in pairs like AX, BC, DE, and HL) as well
as ordinary 8-bit registers.
These registers are identified using functional register names (X, A, C, B, E, D, L, H, AX, BC, DE, and HL) and
absolute register names (R0 to R7 and RP0 to RP3).
Figure 4-6. General-Purpose Register Configuration
(a) Absolute register names
R7
R6
R5
R4
R3
R2
R1
R0
8-bit processing
16-bit processing
RP3
RP2
RP1
RP0
15
0
7
0
(b) Functional register names
H
L
D
E
B
C
A
X
8-bit processing
16-bit processing
HL
DE
BC
AX
15
0
7
0
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