- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄25648 > ST52513F3 (STMICROELECTRONICS) MICROCONTROLLER, PDSO20 PDF資料下載
參數(shù)資料
| 型號： | ST52513F3 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PDSO20 |
| 封裝： | ROHS COMPLIANT, SOP-20 |
| 文件頁數(shù)： | 51/136頁 |
| 文件大?。?/td> | 2791K |
| 代理商： | ST52513F3 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁當(dāng)前第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁
Each interrupt level has its own set of flags, which
is saved in the Flag Stack during interrupt
servicing. These flags are restored from the Flag
Stack automatically when a RETI instruction is
executed.
If the ICU was in normal mode before an interrupt,
after the RETI instruction is executed, the normal
flags are restored.
Note: A subroutine CALL is a normal mode
execution. For this reason a RET instruction,
consequent to a CALL instruction, doesn’t affect
the normal mode set of flags.
Flags are not cleared during context switching and
remain in the state they were in at the exit 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.
The flags, related to the current context, can be
checked by reading the FLAGS Input Register 38
(026h).
Figure 2.3 Multiplication
2.2 Arithmetic Logic Unit
The 8-bit Arithmetic Logic Unit (ALU) performs
arithmetic calculations and logic instructions such
as: sum, subtraction, bitwise AND, OR, XOR, bit
set and reset, bit test and branch, right/left shift and
rotate (see Chapter 9 Instruction Set for further
details).
In addition, the ALU of ST52F510/F513 can
perform multiplication (MULT) and division (DIV).
Multiplication is performed by using 8 bit operands
storing the result in 2 registers (16 bit values); the
division instruction addresses the MSB of the
dividend (the LSB is stored in the next address):
the result and remainder are stored in these source
addresses (see Figure 2.3 and Figure 2.4).
In order to manage signed type values, the ALU
also performs addition and subtraction with offset
(ADDO
and
SUBO).
These
instructions
respectively subtract and add 128 to the overall
result, in order to manage values logically in the
range between -128,127.
Figure 2.4 Division
RAM
000h
001h
002h
i
j+1
j-1
j
0FFh
0FDh
0FEh
REG. j
REG. i
LSB
MSB
X
16 Bit
RAM
i
j+1
j-1
j
REG. j
REG. j+1
REMAINDER
QUOTIENT
REG. i
:
i-1
i+1
000h
001h
002h
0FFh
0FDh
0FEh
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST72361AR6TA | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64 |
| ST72361AR9TC | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64 |
| ST72P361J4TA | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST72F321BAR7TARE | 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP64 |
| ST72P321B(AR6)TCXXXE | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP64 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST52513G2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
| ST52513G3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
| ST52513K2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
| ST52513K3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
| ST52513Y2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。