參數(shù)資料
型號: 780001
廠商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件頁數(shù): 16/129頁
文件大?。?/td> 644K
代理商: 780001
16
CHAPTER 2 REGISTERS
User's Manual U12326EJ4V0UM
Interrupt and
BRK instructions
PSW
PC15-PC8
PC15-PC8
PC7-PC0
Lower half
register pairs
SP SP _ 2
SP _ 2
CALL, CALLF and
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 half
register pairs
2.1.3 Stack pointer (SP)
This is a 16-bit register that holds the start address of the memory stack area. Only the internal high-speed
RAM area can be set as the stack area.
Figure 2-3. Stack Pointer Configuration
The SP is decremented ahead of write (save) to the stack memory and is incremented after read (reset) from
the stack memory.
Each stack operation saves/resets data as shown in Figures 2-4 and 2-5.
Caution Since RESET input makes SP contents undefined, be sure to initialize the SP before instruction
execution.
Figure 2-4. Data to Be Saved to Stack Memory
Figure 2-5. Data to Be Reset from Stack Memory
15
0
SP
RETI and RETB
instructions
PSW
PC15-PC8
PC15-PC8
PC7-PC0
Lower half
register pairs
RET instruction
POP rp
instruction
SP
PC7-PC0
Upper half
register pairs
SP + 1
SP SP + 2
SP
SP + 1
SP SP + 2
SP
SP + 1
SP + 2
SP SP + 3
相關(guān)PDF資料
PDF描述
780018Y Common to 78K/0 Series
780024 Common to 78K/0 Series
780024Y Common to 78K/0 Series
780034 TL Series Toggle Switch, 1 pole, 3 position, Screw terminal, Locking Lever, Military Part Number MS24658-27N
780034Y Common to 78K/0 Series
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
780-001 制造商:EDDING 功能描述:BLACK EXTRAFINE PAINT PEN
780001 BK001 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLK 1000'
780001 BK002 制造商:ALPHA DEARBORN 功能描述:Wire, Hook-Up; 1/0 AWG; 1045/30; 0.082 in.; 0.589 in.; 600 V; Black
780001 BK005 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLACK 100' 制造商:Belden Inc 功能描述:780001 BLACK 100 FT
780001 BL001 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLUE 1000'