DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 427
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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12.3.6
SCR is a register that enables or disables SCI transfer operations and interrupt requests, and is also
used to selection of the transfer clock source. For details on interrupt requests, refer to section
12.9, Interrupts. Some bits in SCR have different functions in normal mode and smart card
interface mode.
• Normal Serial Communication Interface Mode (When SMIF in SCMR is 0)
Bit
7
6
5
4
Bit Name Initial Value
TIE
RIE
TE
RE
Serial Control Register (SCR)
0
0
0
0
R/W
R/W
R/W
R/W
R/W
Description
Transmit Interrupt Enable
When this bit is set to 1, the TXI interrupt request is
enabled.
TXI interrupt request cancellation can be performed by
reading 1 from the TDRE flag, then
clearing it to 0, or clearing the TIE bit to 0.
Receive Interrupt Enable
When this bit is set to 1, RXI and ERI interrupt requests
are enabled.
RXI and ERI interrupt request cancellation can be
performed by reading 1 from the RDRF flag, or the FER,
PER, or ORER flag, then clearing the flag to 0, or
clearing the RIE bit to 0.
Transmit Enable
When this bit s set to 1, transmission is enabled.
In this state, serial transmission is started when transmit
data is written to TDR and the TDRE flag in SSR is
cleared to 0. SMR setting must be performed to decide
the transfer format before setting the TE bit to 1. The
TDRE flag in SSR is fixed at 1 if transmission is disabled
by clearing this bit to 0.
Receive Enable
When this bit is set to 1, reception is enabled.
Serial reception is started in this state when a start bit is
detected in asynchronous mode or serial clock input is
detected in clocked synchronous mode. SMR setting
must be performed to decide the transfer format before
setting the RE bit to 1.
Clearing the RE bit to 0 does not affect the RDRF, FER,
PER, and ORER flags, which retain their states.
Rev.7.00 Dec. 24, 2008 Page 373 of 698
REJ09B0074-0700
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