參數(shù)資料
型號(hào): HD404849TF
廠商: Hitachi,Ltd.
元件分類: 其它接口
英文描述: TERMINAL
中文描述: IGBT模塊
文件頁數(shù): 14/125頁
文件大小: 471K
代理商: HD404849TF
HD404849 Series
14
Functional Description
Registers and Flags
The MCU has nine registers and two flags for CPU operations. They are shown in figure 8 and described
below.
3
0
3
0
3
0
3
0
3
0
3
0
0
0
0
13
9
5
1
(B)
(A)
(W)
(X)
(Y)
(SPX)
(SPY)
(CA)
(ST)
(PC)
(SP)
1
1
1
1
Accumulator
B register
W register
X register
Y register
SPX register
SPY register
Carry
Status
Program counter
Initial value: 0,
no R/W
Stack pointer
Initial value: $3FF, no R/W
0
0
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: 1, no R/W
Figure 8 Registers and Flags
Accumulator (A), B Register (B):
Four-bit registers used to hold the results from the arithmetic logic unit
(ALU) and transfer data between memory, I/O, and other registers.
W Register (W), X Register (X), Y Register (Y):
Two-bit (W) and four-bit (X and Y) registers used for
indirect RAM addressing. The Y register is also used for D-port addressing.
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