MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 253
MC-78F0712-KIT
Manufacturer Part Number
MC-78F0712-KIT
Description
KIT REF SYSTEM 78K0 UPD78F0712
Manufacturer
Renesas Electronics America
Specifications of MC-78F0712-KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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15.3 Register Controlling Multiplier/Divider
Address: FF68H
The multiplier/divider is controlled by multiplier/divider control register 0 (DMUC0).
DMUC0
Symbol
(1) Multiplier/divider control register 0 (DMUC0)
Note When DMUE is set to 1, the operation is started. DMUE is automatically cleared to 0 after the operation is
Cautions 1. If DMUE is cleared to 0 during operation processing (when DMUE is 1), the operation result
DMUC0 is an 8-bit register that controls the operation of the multiplier/divider.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
complete.
2. Do not change the value of DMUSEL0 during operation processing (while DMUE is 1). If it is
3. If DMUE is cleared to 0 during operation processing (while DMUE is 1), the operation
DMUSEL0
DMUE
DMUE
After reset: 00H
<7>
is not guaranteed. If the operation is completed while the clearing instruction is being
executed, the operation result is guaranteed, provided that the interrupt flag is set.
changed, undefined operation results are stored in multiplication/division data register A0
(MDA0) and remainder data register 0 (SDR0).
processing is stopped. To execute the operation again, set multiplication/division data
register A0 (MDA0), multiplication/division data register B0 (MDB0), and multiplier/divider
control register 0 (DMUC0), and start the operation (by setting DMUE to 1).
0
1
0
1
Figure 15-5. Format of Multiplier/Divider Control Register 0 (DMUC0)
Note
Stops operation
Starts operation
Division mode
Multiplication mode
6
0
R/W
CHAPTER 15 MULTIPLIER/DIVIDER
5
0
User’s Manual U17890EJ2V0UD
Operation mode (multiplication/division) selection
4
0
Operation start/stop
3
0
2
0
1
0
DMUSEL0
0
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