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参数资料
| 型号： | ST10R172LT6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, 50 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | 14 X 14 MM, TQFP-100 |
| 文件页数： | 5/68页 |
| 文件大小： | 657K |
| 代理商： | ST10R172LT6 |
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ST10R172L - CENTRAL PROCESSING UNIT
4
CENTRAL PROCESSING UNIT
The main core of the CPU contains a 4-stage instruction pipeline, a separate multiply and
divide unit, a bit-mask generator and a barrel shifter. Most instructions can be executed in one
machine cycle requiring 40ns at 50MHz CPU clock.
The CPU includes an actual register context consisting of 16 wordwide GPRs physically
located in the on-chip RAM area. A Context Pointer (CP) register determines the base
address of the active register bank to be accessed by the CPU. The number of register banks
is only restricted by the available internal RAM space. For easy parameter passing, one
register bank may overlap others.
A system stack of up to 1024 bytes is provided as a storage for temporary data. The system
stack is allocated in the on-chip RAM area, and it is accessed by the CPU via the stack pointer
(SP) register. Two separate SFRs, STKOV and STKUN, are compared against the stack
pointer value during each stack access to detect stack overflow or underflow.
Figure 4 CPU block diagram
16
Internal
RAM
1KByte
R15
R0
General
Purpose
Registers
R0
R15
MDH
MDL
Barrel-Shift
Mul./Div.-HW
Bit-Mask Gen.
ALU
16-Bit
Context Ptr
ADDRSEL 1
ADDRSEL 2
ADDRSEL 3
ADDRSEL 4
Code Seg. Ptr.
CPU
IDX0
IDX1
QX1
QX0
QR0
QR1
SP
STKOV
STKUN
Exec. Unit
Instr. Ptr
Instr. Reg
4-Stage
Pipeline
PSW
SYSCON
BUSCON 0
BUSCON 1
BUSCON 2
BUSCON 3
BUSCON 4
Data Pg. Ptrs
1
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