Execute Transfer Count Registers (Etcr) - Renesas F-ZTAT H8 Series Hardware Manual

Section 8 DMA Controller
8.3.3

Execute Transfer Count Registers (ETCR)

An execute transfer count register (ETCR) is a 16-bit readable/writable register that specifies the
number of transfers to be executed. The functions of these registers differ between normal mode
and block transfer mode.
• Normal mode
ETCRA
Bit 15
Initial value
Read/Write R/W
ETCRB: Is not used in normal mode.
In normal mode ETCRA functions as a 16-bit transfer counter. The count is decremented by 1
each time one transfer is executed. The transfer ends when the count reaches H'0000. ETCRB
is not used.
Rev. 7.00 Sep 21, 2005 page 210 of 878
REJ09B0259-0700
14 13 12 11 10
R/W R/W R/W R/W R/W
9 8 7 6 5
Undetermined
R/W R/W R/W R/W R/W
Transfer counter
4 3 2 1
R/W R/W R/W R/W R/W
0