21. Serial Communication Interface with FIFO (SCIF)
Rev.1.00 Jan. 10, 2008 Page 1062 of 1658
REJ09B0261-0100
21.3.9 FIFO Control Register n (SCFCR) SCFCR is a register that performs data count resetting and trigger data number setting for transmit and receive FIFO registers, and also contains a loopback test enable bit. SCFCR can always be read from and written to by the CPU.
01234567891011121315 14
0000000000000000
LOOPRFCLTFCLMCE*
1
TTRG0TTRG1RTRG0RTRG1
RST
RG2*
1
RST
RG1*
1
RST
RG0*
1
⎯⎯⎯⎯⎯
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WRRRRR
BIt:
Initial value:
R/W:
Bit Bit Name
Initial
Value R/W Description
15 to 11 — All 0 R Reserved
These bits are always read as 0. The write value
should always be 0.
10
9
8
RSTRG2*1
RSTRG1*1
RSTRG0*1
0
0
0
R/W
R/W
R/W
SCIF_RTS Output Active Trigger
The SCIF_RTS signal becomes high when the number
of receive data stored in SCFRDR exceeds the trigger
setting count shown below.
000:63
001:1
010:8
011:16
100:32
101:48
110:54
111:60
7
6
RTRG1
RTRG0
0
0
R/W
R/W
Receive FIFO Data Count Trigger
These bits are used to set the number of receive data
bytes that sets the RDF flag in SCFSR.
The RDF flag is set when the number of receive data
bytes in SCFRDR is equal to or greater than the trigger
setting count shown below.
00:1
01:16
10:32
11:48