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參數(shù)資料
| 型號(hào)： | ST52X420 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類(lèi)： | ADC |
| 英文描述： | 8-BIT INTELLIGENT CONTROLLER UNIT (ICU) Three Timer/PWMs, ADC, WDG |
| 中文描述： | 8位智能控制器病房（ICU）3個(gè)定時(shí)器/的PWM，ADC的，水分散粒劑 |
| 文件頁(yè)數(shù)： | 21/84頁(yè) |
| 文件大?。?/td> | 1274K |
| 代理商： | ST52X420 |
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ST52T410/ST52T420/E420
21/84
2.4 Arithmetic Logic Unit
The 8-bit Arithmetic Logic Unit (ALU) allows the
performance of arithmetic calculations and logic
instructions, which can be divided into 5 groups:
Load, Arithmetic, Jump, Interrupts and Program
Control instructions (refer to the ST52T410/
ST52x420 Assembler Set for further details).
The computational time required for each
instruction consists of one clock pulse for each
Cycle plus 3 clock pulses for the decoding phase.
The ALU of the ST52T410/ST52x420 can perform
multiplication
(MULT)
Multiplication is performed by using 8 bit operands
storing the result in 2 registers (16 bit values), see
Figure 2.5 and Figure 2.6.
WARNING 1: The current page register value
set with the PGSET instruction is lost after a
jump, call, or an interrupt jump.
WARNING 2: If the LSB of the multiplication
result is 0, the Zero flag is set although the
result is not 0.
and
division
(DIV).
Table 2.4 Output Registers
OR MNEMONIC NAME
PERIPHERAL REGISTER
ADDRESS
PORT_ A
PORT A OR
0
PORT_ B
PORT B OR
1
PORT_C
PORT C OR
2
PWM_0_COUNT
TIMER/PWM 0 COUNTER
3
PWM_0_RELOAD
TIMER/PWM 0 RELOAD REGISTER
4
PWM_1_COUNT
TIMER/PWM 1 COUNTER
5
PWM_1_RELOAD
TIMER/PWM 1 RELOAD REGISTER
6
PWM_ 2_ COUNT
TIMER/PWM 2 COUNTER
7
PWM_2_RELOAD
TIMER/PWM 2 RELOAD REGISTER
8
Table 2.5 Load instructions
Load Instructions
Mnemonic
Instruction
Bytes
Cycles
Z
S
C
LDCE
LDCE conf, EPROM
3
17
-
-
-
LDCR
LDCR conf, RAM
3
14
-
-
-
LDFR
LDFR FUZZY_i_RAM RAM
3
14
-
-
-
LDPE
LDPE per, EPROM
3
17
-
-
-
LDPE
LDPE per, (RAM)
3
17
-
-
-
LDPR
LDPR reg, RAM
3
14
-
-
-
LDRC
LDRC RAM, const
3
14
-
-
-
LDRE
LDRE RAMi, EPROMi
3
16
-
-
-
LDRE
LDRE (RAMi), (RAMj)
3
18
-
-
-
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