参数资料
型号: 780964
厂商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件页数: 16/129页
文件大小: 644K
代理商: 780964
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
相关PDF资料
PDF描述
78098 Common to 78K/0 Series
78098B Common to 78K/0 Series
78044H Common to 78K/0 Series
78058F common to 78K/0 Series
780001 Common to 78K/0 Series
相关代理商/技术参数
参数描述
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78097-004 功能描述:I/O 连接器 2X3 PCB Receptacle, Low Profile, Right Angle RoHS:否 制造商:Hirose Connector 产品:Plugs 系列:DH 端口数量: 位置/触点数量:51 节距:1 mm 触点电镀: 触点材料: 型式:Male 电流额定值:0.5 A 安装风格:Cable 端接类型:IDC 颜色: 安装角:
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78097-007 功能描述:I/O 连接器 2X3 PCB Receptacle, Low Profile, Right Angle RoHS:否 制造商:Hirose Connector 产品:Plugs 系列:DH 端口数量: 位置/触点数量:51 节距:1 mm 触点电镀: 触点材料: 型式:Male 电流额定值:0.5 A 安装风格:Cable 端接类型:IDC 颜色: 安装角: