SAB-C509-LM SIEMENS [Siemens Semiconductor Group], SAB-C509-LM Datasheet - Page 49

• Manufacturer Part Number: SAB-C509-LM
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

For starting an operation, registers MD0 to MD5 and ARCON must be written to in a certain
sequence according table 8 and 9. The order the registers are accessed determines the type of the
operation. A shift operation is started by a final write operation to SFR ARCON.
Table 9
Programming the MDU for Multiplication and Division
Operation
First Write
Last Write
First Read
Last Read
Abbrevations :
D'end
D'or
M'and
M'or
Pr
Rem
Quo
...L
...H
Table 10
Programming athe MDU for a Shift or Normalize Operation
Operation
First write
Last write
First read
Last read
Semiconductor Group
: Dividend, 1st operand of division
: Divisor, 2nd operand of division
: Multiplicand, 1st operand of multiplication
: Multiplicator, 2nd operand of multiplication
: Product, result of multiplication
: Remainder
: Quotient, result of division
: means, that this byte is the least significant of the 16-bit or 32-bit operand
: means, that this byte is the most significant of the 16-bit or 32-bit operand
32Bit/16Bit
MD0
MD1
MD2
MD3
MD4
MD5
MD0
MD1
MD2
MD3
MD4
MD5
Normalize, Shift Left, Shift Right
MD0
MD1
MD2
MD3
ARCON
MD0
MD1
MD2
MD3
D’endL
D’end
D’end
D’endH
D’orL
D’orH
QuoL
Quo
Quo
QuoH
RemL
RemH
least significant byte
most significant byte
start of conversion
least significant byte
most significant byte
48
16Bit/16Bit
MD0
MD1
MD4
MD5
MD0
MD1
MD4
MD5
.
.
.
.
D’endL
D’endH
D’orL
D’orH
QuoL
QuoH
RemL
RemH
16Bit x 16Bit
MD0
MD4
MD1
MD5
MD0
MD1
MD2
MD3
M’andL
M’orL
M’andH
M’orH
PrL
PrH
C509-L