D12320VF25V Datasheet, PDF (224/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 7 Data Transfer Controller
transferred, and the contents of CRAH are sent when the count reaches H'00. This operation is
repeated.
7.2.6
Bit
DTC Transfer Count Register B (CRB)
: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Initial value : Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde- Unde-
fined fined fined fined fined fined fined fined fined fined fined fined fined fined fined fined
R/W
:— — — — — — — — — — — — — — — —
CRB is a 16-bit register that designates the number of times data is to be transferred by the DTC in
block transfer mode. It functions as a 16-bit transfer counter (1 to 65,536) that is decremented by 1
every time data is transferred, and transfer ends when the count reaches H'0000.
7.2.7 DTC Enable Registers (DTCER)
Bit
:
Initial value :
R/W
:
7
DTCE7
0
R/W
6
DTCE6
0
R/W
5
DTCE5
0
R/W
4
DTCE4
0
R/W
3
DTCE3
0
R/W
2
DTCE2
0
R/W
1
DTCE1
0
R/W
0
DTCE0
0
R/W
The DTC enable registers comprise six 8-bit readable/writable registers, DTCERA to DTCERF,
with bits corresponding to the interrupt sources that can activate the DTC. These bits enable or
disable DTC service for the corresponding interrupt sources.
The DTC enable registers are initialized to H'00 by a reset and in hardware standby mode.
Rev.7.00 Feb. 14, 2007 page 190 of 1108
REJ09B0089-0700