參數(shù)資料
型號: SAB-80C517A-N18
廠商: SIEMENS AG
元件分類: 8位微控制器
英文描述: 8-Bit CMOS Single-Chip Microcontroller
中文描述: 8位CMOS單芯片微控制器
文件頁數(shù): 48/77頁
文件大小: 1358K
代理商: SAB-80C517A-N18
SAB 80C517A/83C517A-5
Semiconductor Group
47
1994-05-01
Multiplication/Division Unit
This on-chip arithmetic unit provides fast 32-bit division, 16-bit multiplication as well as shift
and normalize features. All operations are integer operation.
The MDU consists of six registers used for operands and results and one control register.
Operation of the MDU can be divided in three phases:
Operation of the MDU
To start an operation, register MD0 to MD5 (or ARCON) must be written to in a certain se-
quence according to table 5 or 6. The order the registers are accessed determines the type of
the operation. A shift operation is started by a final write operation to register ARCON (see also
the register description).
Operation
Result
Remainder
Execution Time
32-bit/16-bit
32-bit
16-bit
6 t
cy
1)
4 t
cy
16-bit/16-bit
16-bit
16-bit
16-bit
*
16-bit
32-bit
4 t
cy
32-bit normalize
6 t
cy
2)
32-bit shift left/right
6 t
cy
2)
1)
1
t
cy
= 1
μ
s @ 12 MHz oscillator frequency.
2)
The maximal shift speed is 6 shifts/cycle.
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