D12320VF25IV Datasheet, PDF (270/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 7 DMA Controller (Not Supported in the H8S/2321)
7.3.3 Execute Transfer Count Register (ETCR)
ETCR is a 16-bit readable/writable register that specifies the number of transfers. The function of
this register is different in normal mode and in block transfer mode.
ETCR is not initialized by a reset or in standby mode.
Normal Mode
ETCRA
Transfer Counter
Bit
: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Initial value : * * * * * * * * * * * * * * * *
R/W
: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
*: Undefined
In normal mode, ETCRA functions as a 16-bit transfer counter. ETCRA is decremented by 1 each
time a transfer is performed, and transfer ends when the count reaches H'0000. ETCRB is not used
at this time.
ETCRB
ETCRB is not used in normal mode.
Rev.6.00 Sep. 27, 2007 Page 238 of 1268
REJ09B0220-0600