參數(shù)資料
型號: μPD789806Y
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): 26/125頁
文件大小: 366K
代理商: ΜPD789806Y
CHAPTER 2 REGISTERS
9
Figure 2-4. Data to be Saved to Stack Memory
Interrupt
PSW
PC15-PC8
PC15-PC8
PC7-PC0
Lower byte in
register pair
SP SP - 2
SP - 2
CALL, CALLT
instructions
PUSH rp
instruction
SP - 1
SP
SP SP - 2
SP - 2
SP - 1
SP
PC7-PC0
SP - 3
SP - 2
SP - 1
SP
SP SP - 3
Upper byte in
register pair
Figure 2-5. Data to be Restored from Stack Memory
RETI instruction
PSW
PC15-PC8
PC15-PC8
PC7-PC0
Lower byte in
register pair
RET instruction
POP rp
instruction
SP
PC7-PC0
Upper byte in
register pair
SP + 1
SP SP + 2
SP
SP + 1
SP SP + 2
SP
SP + 1
SP + 2
SP SP + 3
2.2 GENERAL-PURPOSE REGISTERS
Eight 8-bit general-purpose registers (X, A, C, B, E, D, L, and H) are supported.
Each register can be used as an 8-bit register, or two 8-bit registers in pairs can be used as a 16-bit register (AX,
BC, DE, and HL).
They can be described in terms of functional names (X, A, C, B, E, D, L, H, AX, BC, DE, and HL) and absolute
names (R0 to R7 and RP0 to RP3).
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