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| 型號(hào)： | ST20GP1 |
| 英文描述： | MAX 7000 CPLD 256 MC 208-PQFP |
| 中文描述： | GPS處理器 |
| 文件頁(yè)數(shù)： | 18/116頁(yè) |
| 文件大?。?/td> | 1107K |
| 代理商： | ST20GP1 |
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ST20-GP1
18/116
4
Central processing unit
The Central Processing Unit (CPU) is the ST20 32-bit processor core. It contains instruction
processing logic, instruction and data pointers, and an operand register. It can directly access the
high speed on-chip memory, which can store data or programs. Where larger amounts of memory
are required, the processor can access memory via the External Memory Interface (EMI).
The processor provides high performance:
Fast integer multiply — 3 cycle multiply
Fast bit shift — single cycle barrel shifter
Byte and part-word handling
Scheduling and interrupt support
64-bit integer arithmetic support
The scheduler provides a single level of pre-emption. In addition, multi-level pre-emption is
provided by the interrupt subsystem, see Chapter 5 for details. Additionally, there is a per-priority
trap handler to improve the support for arithmetic errors and illegal instructions, refer to section 4.6.
4.1
Registers
The CPU contains six registers which are used in the execution of a sequential integer process.
The six registers are:
The workspace pointer (
Wptr
) which points to an area of store where local data is kept.
The instruction pointer (
IptrReg
) which points to the next instruction to be executed.
The status register (
StatusReg
).
The
Areg
,
Breg
and
Creg
registers which form an evaluation stack.
The
Areg
,
Breg
and
Creg
registers are the sources and destinations for most arithmetic and
logical operations. Loading a value into the stack pushes
Breg
into
Creg
, and
Areg
into
Breg
,
before loading
Areg
. Storing a value from
Areg
, pops
Breg
into
Areg
and
Creg
into
Breg
.
Creg
is
left undefined.
Figure 4.1 Registers used in sequential integer processes
Areg
Breg
Creg
Wptr
IptrReg
Local data
Program
Registers
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST20GP6 | MAX 7000 CPLD 256 MC 208-RQFP |
| ST25C02AB1 | IC FLEX 6000 FPGA 16K 144-TQFP |
| ST25C02AB6 | Stratix FPGA 25K FBGA-672 |
| ST25C02AM1 | IC ACEX 1K FPGA 100K 208-PQFP |
| ST25C02AM6 | Cyclone II FPGA 20K FBGA-256 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST20-GP1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP1X33S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GPS PROCESSOR |
| ST20-GP6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP6CT33S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
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