SH7619 Datasheet, PDF (817/836 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7619 Series

Main Revisions and Additions in this Edition
Item
Page Revision (See Manual for Details)
Table 8.3 Possible Combination 205
of Clock Modes and FRQCR
Values
Amended
Mode
Input Clock
Frequency Range
(Pφ must be equal
to or lower than
31.25 MHz)
15.3.7 Serial Status Register
(SCFSR)
389
Amended
Mode Description
5
Transmit FIFO Data Empty
Indicates that data has been transferred from the transmit FIFO
data register (SCFTDR) to the transmit shift register (SCTSR), the
quantity of data in SCFTDR has become less than the transmission
trigger number specified by the TTRG1 and TTRG0 bits in the FIFO
control register (SCFCR), and writing of transmit data to SCFTDR is
enabled.
0: The quantity of transmit data written to SCFTDR is greater than
the specified transmission trigger number
[Clearing conditions]
• TDFE is cleared to 0 when data exceeding the specified
transmission trigger number is written to SCFTDR after 1 is
read from TDFE and then 0 is written
• TDFE is cleared to 0 when DMAC write data exceeding the
specified transmission trigger number to SCFTDR
1: The quantity of transmit data in SCFTDR is equal to or less than
the specified transmission trigger number*
[Setting conditions]
• TDFE is set to 1 by a power-on reset
• TDFE is set to 1 when the quantity of transmit data in
SCFTDR has become equal to or less than the specified
transmission trigger number as a result of transmission
Note: *
Since SCFTDR is a 16-byte FIFO register, the
maximum quantity of data that can be written when TDFE is 1 is "16
minus the specified transmission trigger number". If an attempt is
made to write additional data, the data is ignored. The quantity of
data in SCFTDR is indicated by the upper 8 bits of SCFDR.
Rev. 5.00 Mar. 15, 2007 Page 779 of 794
REJ09B0237-0500