DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 228
DF2211NP24V
Manufacturer Part Number
DF2211NP24V
Description
H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
Manufacturer
Renesas Technology / Hitachi Semiconductor
Datasheet
1.DF2211NP24V.pdf
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Rev.7.00 Dec. 24, 2008 Page 174 of 698
REJ09B0074-0700
Bit Bit Name Initial Value R/W
8
7
–
DTME1
0
0
R/W
R/W
Description
Reserved
Although this bit is readable/writable, only 0 should be written
to.
Data Transfer Master Enable
Together with the DTE bit, this bit controls enabling or
disabling of data transfer on the relevant channel. When both
the DTME bit and the DTE bit are set to 1, transfer is enabled
for the channel. If the relevant channel is in the middle of a
burst mode transfer when an NMI interrupt is generated, the
DTME bit is cleared, the transfer is interrupted, and bus
mastership passes to the CPU. When the DTME bit is
subsequently set to 1 again, the interrupted transfer is
resumed. In block transfer mode, however, the DTME bit is
not cleared by an NMI interrupt, and transfer is not
interrupted.
The conditions for the DTME bit being cleared to 0 are as
follows:
•
•
•
The condition for DTME being set to 1 is as follows:
•
Data Transfer Master Enable 1
Enables or disables data transfer on channel 1
0: Data transfer disabled. In burst mode, cleared to 0 by an
1: Data transfer enabled
NMI interrupt
When initialization is performed
When NMI is input in burst mode
When 0 is written to the DTME bit
When 1 is written to DTME after DTME is read as 0
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