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参数资料
| 型号： | ST52T430K3B6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | PLASTIC, SDIP-32 |
| 文件页数： | 5/85页 |
| 文件大小： | 1192K |
| 代理商： | ST52T430K3B6 |
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ST52T430/E430
13/85
The ST52x430 core uses flags that correspond to
the actual mode. As soon as an interrupt is
generated the ST52x430 core uses the interrupt
flags instead of the normal flags.
Each interrupt level has its own set of flags, which
is saved in the STACK together with the Program
Counter. These flags are restored from the STACK
automatically when a RETI instruction is executed.
If the MCU was in normal mode before an interrupt,
the normal flags are restored when the RETI
instruction is executed.
Note: A CALL subroutine is a normal mode
execution. For this reason, a RET instruction,
consequent to a CALL instruction does not affect
the normal mode set of flags.
Flags are not cleared during context switching and
remain in the state they were at the end of the last
interrupt routine switching.
The Carry flag is set when an overflow occurs
during arithmetic operations, otherwise it
is
cleared.
The Sign flag is set when an underflow occurs
during
arithmetic operations,
otherwise
it
is
cleared.
2.3 Address Spaces
ST52x430 has four separate address spaces:
I RAM: 256 Bytes
Figure 2.3 Address Spaces Description
I Input Registers: 20 8-bit registers
I Output Registers 10 8-bit registers
I Configuration Registers: 21 8-bit registers
I Program memory up to 8K Bytes
Program memory will be described in further
details in the MEMORY section
2.3.1 RAM and STACK.
RAM memory consists of 256 general purpose 8-
bit RAM registers.
All the registers in RAM can be specified by using
a decimal address. For example, 0 identifies the
first register of RAM.
To read or write RAM registers LOAD instructions
must be used. See Table 2.5
Each interrupt level has its own set of flags, which
is saved in the STACK together with the Program
Counter. These flags are restored from the STACK
automatically when a RETI instruction is executed.
When the instructions like Interrupt request or
CALL are executed, a STACK level is used to push
the PC.
The STACK is located in RAM. For each level of
stack, 2 bytes of RAM are used. The values of this
stack are stored from the last RAM register
(address 255). The maximum level of stack
must be less than 128.
ST52X430 CORE
PROGRAM MEMORY
RAM
CONTROL UNIT
DPU
ALU
ON CHIP PERIPHERALS
PERIPHERAL REGISTERS
CONFIGURATION
REGISTERS
INPUT REGISTERS
LDRI
LDCR
LDPR
LDRC
LDCE
PERIPHERAL
BLOCK
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST52T430K3M6 | 制造商:STMicroelectronics 功能描述: |
| ST52T430K3T6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT INTELLIGENT CONTROLLER UNIT ICU Three Timer/PWMs, ADC, SCI |
| ST52T440 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT INTELLIGENT CONTROLLER UNIT ICU Timer/PWM, Analog Comparator, Triac/PWM Timer, WDG |
| ST52T440F0B6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT INTELLIGENT CONTROLLER UNIT ICU Timer/PWM, Analog Comparator, Triac/PWM Timer, WDG |
| ST52T440F0M6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT INTELLIGENT CONTROLLER UNIT ICU Timer/PWM, Analog Comparator, Triac/PWM Timer, WDG |
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