Datasheet

Rev.6.00 Oct.28.2004 page 245 of 1016
REJ09B0138-0600H
Bit 1—DTC Transfer Mode Select (DTS): Specifies whether the source side or the destination side is set to be a repeat
area or block area, in repeat mode or block transfer mode.
Bit 1
DTS Description
0 Destination side is repeat area or block area
1 Source side is repeat area or block area
Bit 0—DTC Data Transfer Size (Sz): Specifies the size of data to be transferred.
Bit 0
Sz Description
0 Byte-size transfer
1 Word-size transfer
8.2.2 DTC Mode Register B (MRB)
Bit:76543210
CHNE DISEL — — — — — —
Initial value : Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
R/W:————————
MRB is an 8-bit register that controls the DTC operating mode.
Bit 7—DTC Chain Transfer Enable (CHNE): Specifies chain transfer. With chain transfer, a number of data transfers
can be performed consecutively in response to a single transfer request.
In data transfer with CHNE set to 1, determination of the end of the specified number of transfers, clearing of the interrupt
source flag, and clearing of DTCER is not performed.
Bit 7
CHNE Description
0 End of DTC data transfer (activation waiting state is entered)
1 DTC chain transfer (new register information is read, then data is transferred)
Bit 6—DTC Interrupt Select (DISEL): Specifies whether interrupt requests to the CPU are disabled or enabled after a
data transfer.
Bit 6
DISEL Description
0 After a data transfer ends, the CPU interrupt is disabled unless the transfer counter is
0 (the DTC clears the interrupt source flag of the activating interrupt to 0)
1 After a data transfer ends, the CPU interrupt is enabled (the DTC does not clear the
interrupt source flag of the activating interrupt to 0)
Bits 5 to 0—Reserved: These bits have no effect on DTC operation in the H8S/2357 Group, and should always be written
with 0.