Rev. 2.00, 09/03, page 398 of 690
16.3.10
FIFO Control Register (SCFCR)
SCFCR is a 16-bit readable/writable register that resets the data count and sets the trigger data
number for the transmit and receive FIFO registers, and also contains a loopback test enable bit.
Bit
Bit
Name
Initial
Value
R/W
Description
15
TSE
0
R/W
Transmit Data Stop Enable
Enables or disables the transmit data stop function.
This function is enabled only in asynchronous mode.
Since this function is not supported in clock synchronous
mode, clear this bit to 0 in clock synchronous mode.
0: Transmit data stop function disabled
1: Transmit data stop function enabled
14
TCRST
0
R/W
Transmit Count Reset
Clears the transmit count to 0. This bit is valid only when
the transmit data stop function is used.
0: Transmit count reset disabled
*
1: Transmit count reset enabled (clearing to 0)
Note:
*
The transmit count is reset (clearing to 0) is
performed in power-on reset or manual reset.
13 to 11
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
10
9
8
RSTRG2
RSTRG1
RSTRG0
0
0
0
R/W
R/W
R/W
RTS
Output Active Trigger
The
RTS
signal goes high when the number of receive
data bytes in SCFRDR is equal to or greater than the
trigger set number shown in below.
000: 63
001: 1
010: 8
011: 16
100: 32
101: 48
110: 54
111: 60
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