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H8S/2214 Scheda tecnica(PDF) 252 Page - Renesas Technology Corp

Il numero della parte H8S/2214
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  936 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2214 Scheda tecnica(HTML) 252 Page - Renesas Technology Corp

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Section 7 DMA Controller
Rev.4.00 Sep. 18, 2008 Page 192 of 872
REJ09B0189-0400
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.
(1) Normal Mode
ETCRA
Transfer Counter
Bit
:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ETCR
:
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.



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