- 您现在的位置：买卖IC网 > PDF目录378674 > MPC603E (Motorola, Inc.) PowerPC 603e RISC Microprocessor PDF资料下载
参数资料
| 型号： | MPC603E |
| 厂商： | Motorola, Inc. |
| 英文描述： | PowerPC 603e RISC Microprocessor |
| 中文描述： | RISC微处理器的PowerPC 603e |
| 文件页数： | 13/31页 |
| 文件大小： | 132K |
| 代理商： | MPC603E |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页
PowerPC 603e RISC Microprocessor Technical Summary
13
2.2.4 Floating-Point Status and Control Register (FPSCR)
The floating-point status and control register (FPSCR) is a user-level register that contains all exception
signal bits, exception summary bits, exception enable bits, and rounding control bits needed for compliance
with the IEEE-754 standard.
2.2.5 Machine State Register (MSR)
The machine state register (MSR) is a supervisor-level register that defines the state of the processor. The
contents of this register are saved when an exception is taken and restored when the exception handling
completes. The 603e implements the MSR as a 32-bit register; 64-bit PowerPC processors implement a 64-
bit MSR.
2.2.6 Segment Registers (SRs)
For memory management, 32-bit PowerPC microprocessors implement sixteen 32-bit segment registers
(SRs). To speed access, the 603e implements the segment registers as two arrays; a main array (for data
memory accesses) and a shadow array (for instruction memory accesses). Loading a segment entry with the
Move to Segment Register
(
mtsr
)
instruction loads both arrays.
2.2.7 Special-Purpose Registers (SPRs)
The PowerPC operating environment architecture defines numerous special-purpose registers that serve a
variety of functions, such as providing controls, indicating status, configuring the processor, and performing
special operations. During normal execution, a program can access the registers, shown in Figure 2,
depending on the program’s access privilege (supervisor or user, determined by the privilege-level (PR) bit
in the MSR). Note that registers such as the GPRs and FPRs are accessed through operands that are part of
the instructions. Access to registers can be explicit (that is, through the use of specific instructions for that
purpose such as Move to Special-Purpose Register (
(
mfspr
) instructions) or implicit, as the part of the execution of an instruction. Some registers are accessed
both explicitly and implicitly
mtspr
) and Move from Special-Purpose Register
In the 603e, all SPRs are 32 bits wide.
2.2.7.1 User-Level SPRs
The following 603e SPRs are accessible by user-level software:
Link register (LR)—The link register can be used to provide the branch target address and to hold
the return address after branch and link instructions. The LR is 32 bits wide in 32-bit
implementations.
Count register (CTR)—The CTR is decremented and tested automatically as a result of branch-and-
count instructions. The CTR is 32 bits wide in 32-bit implementations.
XER register—The 32-bit XER contains the summary overflow bit, integer carry bit, overflow bit,
and a field specifying the number of bytes to be transferred by a Load String Word Indexed (
or Store String Word Indexed (
stswx
) instruction.
lswx
)
2.2.7.2 Supervisor-Level SPRs
The 603e also contains SPRs that can be accessed only by supervisor-level software. These registers consist
of the following:
The 32-bit DSISR defines the cause of data access and alignment exceptions.
The data address register (DAR) is a 32-bit register that holds the address of an access after an
alignment or DSI exception.
相关PDF资料 |
PDF描述 |
|---|---|
| MPC958 | LOW VOLTAGE PLL CLOCK DRIVER |
| MPC9608 | 1:10 LVCMOS Zero Delay Clock Buffer |
| MPC961C | LOW VOLTAGE ZERO DELAY BUFFER |
| MPC9658 | 3.3V 1:10 LVCMOS PLL Clock Generator |
| MPF820 | JFET RF AMPLIFIER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC603E7TEC | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:PowerPC 603e RISC Microprocessor |
| MPC603E7TED | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:PowerPC 603e RISC Microprocessor |
| mpc603efe100ln | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MPC603EFE100TN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:PowerPC 603e RISC Microprocessor Family: PID6-603e (Stretch) Part Number Specifications |
| MPC603EFE133LN | 制造商:Motorola Inc 功能描述: |
发布紧急采购，3分钟左右您将得到回复。