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Chapter 3
CPU Functions
User’s Manual U16580EE3V1UD00
3.4.9 System wait control register (VSWC)
The system wait control register (VSWC) is a register that controls the bus access wait for the on-chip
peripheral I/O registers.
Access to on-chip peripheral I/O registers is made in 3 clocks (without wait), however, in the
V850E/PH2 waits may be required depending on the operation frequency. Set the values described in
the table below to the VSWC register in accordance with the operation frequency used.
This register can be read or written in 1-bit or 8-bit units.
3.4.10 DMA wait control registers 0 and 1 (DMAWC0, DMAWC1)
The DMA wait control registers 0 and 1 (DMAWC0, DMAWC1) are a registers that control the bus
access wait and signal timing for DMA transfers.
Set the values described in the table below to the DMAWC0 and DMAWC1 registers in accordance with
the operation frequency used.
This register can be read or written in 1-bit or 8-bit units.
Register Name
Operating frequency
Set Value
Address
After reset
VSWC
64 MHz
13H
FFFFF06EH
77H
Register Name
Operating frequency
Set Value
Address
After reset
DMAWC0
64 MHz
13H
FFFFFE00H
37H
DMAWC1
04H
FFFFFE02H
07H
Содержание V850E/PH2
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