21. Serial Communication Interface with FIFO (SCIF)
Rev.1.00 Jan. 10, 2008 Page 1064 of 1658
REJ09B0261-0100
21.3.10 Transmit FIFO Data Count Register n (SCTFDR) SCTFDR is a 16-bit register that indicates the number of transmit data bytes stored in SCFTDR. SCTFDR can always be read from the CPU.
01234567891011121315 14
0000000000000000
T0T1T2T3T4T5T6⎯⎯
RRRRRRRRRRRRRRRR
BIt:
Initial value:
R/W:
Bit Bit Name
Initial
Value R/W Description
15 to 7 All 0 R Reserved
These bits are always read as 0. The write value
should always be 0.
6 to 0 T6 to T0 All 0 R These bits show the number of untransmitted data
bytes in SCFTDR. A value of H'00 indicates that there
is no transmit data, and a value of H'40 indicates that
SCFTDR is full of the maximum number (64 bytes) of
transmit data.