DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 434

• 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

• Smart Card Interface Mode (When SMIF in SCMR is 1)
Rev.7.00 Dec. 24, 2008 Page 380 of 698
REJ09B0074-0700
Bit
7
6
Bit Name Initial Value R/W
TDRE
RDRF
1
0
R/(W)*
R/(W)*
1
1
Description
Transmit Data Register Empty
Indicates whether TDR contains transmit data.
[Setting conditions]
•
•
[Clearing conditions]
•
•
Receive Data Register Full
Indicates that the received data is stored in RDR.
[Setting condition]
When serial reception ends normally and receive data is
transferred from RSR to RDR
[Clearing conditions]
•
•
The RDRF flag is not affected and retains their previous
values when the RE bit in SCR is cleared to 0.
If reception of the next data is completed while the RDRF
flag is still set to 1, an overrun error will occur and the
receive data will be lost.
When the TE bit in SCR is 0
When data is transferred from TDR to TSR and data
can be written to TDR
When 0 is written to TDRE after reading TDRE = 1*
When the DMAC is activated by a TXI interrupt
request and writes data to TDR
When 0 is written to RDRF after reading RDRF = 1*
When the DMAC is activated by an RXI interrupt and
transferred data from RDR
2
2