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参数资料
| 型号： | MA300012 |
| 厂商： | Microchip Technology |
| 文件页数： | 12/92页 |
| 文件大小： | 0K |
| 描述： | MODULE DSPIC30F SAMPLE 64QFP |
| 标准包装： | 1 |
| 模块/板类型： | dsPIC30F 插件模块 |
| 适用于相关产品： | DM240001 |
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dsPIC30F
5.2
Programmer ’s Model
W15 is the dedicated software Stack Pointer (SP). It is
consists of 16 x 16-bit working registers (W0 through
W15), 2 x 40-bit accumulators (ACCA and ACCB),
STATUS Register (SR), Data Table Page register
(TBLPAG), Program Space Visibility Page register
(PSVPAG), DO and REPEAT registers (DOSTART,
DOEND, DCOUNT and RCOUNT) and Program
Counter (PC). The working registers can act as data,
address or offset registers. All registers are memory
mapped. W0 is the W register for all instructions that
perform file register addressing.
Some of these registers have a shadow register
associated with them (see the legend in Figure 5-2).
The shadow register is used as a temporary holding
register and can transfer its contents to or from its host
register upon some event occurring in a single cycle.
None of the shadow registers are accessible directly.
When a byte operation is performed on a working
register, only the Least Significant Byte of the target
register is affected. However, a benefit of memory
mapped working registers is that both the Least and
Most Significant Bytes can be manipulated through
byte wide data memory space accesses.
DS70043F-page 10
automatically modified by exception processing and
subroutine calls and returns. However, W15 can be
referenced by any instruction in the same manner as all
other W registers. This simplifies the reading, writing
and manipulation of the Stack Pointer (e.g., creating
stack frames).
W14 has been dedicated as a Stack Frame Pointer, as
defined by the LNK and ULNK instructions. However,
W14 can be referenced by any instruction in the same
manner as all other W registers.
The Stack Pointer always points to the first available
free word and grows from lower addresses towards
higher addresses. It pre-decrements for stack pops
(reads) and post-increments for stack pushes (writes).
? 2005 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MA300013 | 功能描述:子卡和OEM板 dsPIC30F 80L Plug In Sample RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| MA300013 | 制造商:Microchip Technology Inc 功能描述:Tools Development kit Kit Con |
| MA300014 | 功能描述:子卡和OEM板 dsPIC30F 80L Plug In Sample (6014A) RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| MA300015 | 功能描述:子卡和OEM板 dsPIC30F 80L Plug In Sample (6010A). RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| MA300016 | 功能描述:子卡和OEM板 dsPICDEM 80-PIN PIM RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
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