SB16C1058-TQFP128 IK Semicon Co., Ltd, SB16C1058-TQFP128 Datasheet - Page 46

• Manufacturer Part Number: SB16C1058-TQFP128
• Description: Octal-uart Controller With 256-byte Fifo
• Manufacturer: IK Semicon Co., Ltd

IN16C1058
OCTAL UART WITH 256-BYTE FIFO
JUNE 2009
46
REV 1.0
7.18 Auto Toggle Control Register (ATR, Page 3)
ATR controls the signals for controlling input/output signals when using Line Interface as
RS422 or RS485, so eliminates additional glue logic outside. Table 21 shows ATR bit
settings.
Table 21:
Bit
7
6
5
4
3:2
1:0
Symbol
ATR[7]
ATR[6]
ATR[5]
ATR[4]
ATR[3:2]
ATR[1:0]
Auto Toggle Control Register Description
Auto Toggle Enable.
Description
RXEN Polarity Select.
RXEN Control Mode Select.
TXEN Polarity Select.
TXEN Control Mode Select.
Not used, always ‘00’.
0 : Asserted output of RXEN is ‘0’.
1 : Asserted output of RXEN is ‘1’. (default)
Only when ATR[1:0] is ‘11’;
0 : RXEN is outputted as same as ATR[7], irrespective of TXD
1 : RXEN is outputted as same as ATR[7] when TXD signal is not
0 : Asserted output of TXEN is ‘0’. (default)
1 : Asserted output of TXEN is ‘1’.
0 : TXEN is outputted as same as ATR[5], irrespective of TXD
1 : TXEN is outputted as complement of ATR[5] when TXD signal
00 : Auto toggle is disabled (default).
01 : nRTS_TXEN pin operates as TXEN. nDTR_TXEN pin
10 : nDTR_TXEN pin operates as TXEN. nRTS_TXEN operates
11 : nTXRDY_TXEN, nRXRDY_RXEN pin operates as TXEN,
transmitting. And outputted as complement of ATR[7] when
TXD signal is transmitting.
is not transmitting, and outputted as same as ATR[5] when
TXD signal is transmitting..
signal. (default)
signal. (default)
each of nTXRDY_TXEN, nRXRDY_RXEN operates as
nTXRDY, nRXRDY.
operates
nRXRDY_RXEN operates as nTXRDY, nRXRDY.
as nRTS. And each of nTXRDY_TXEN, nRXRDY_RXEN
operates as nTXRDY, nRXRDY.
RXEN. nRTS_TXEN, nDTR_TXEN operates as nRTS, nDTR.
nRTS_TXEN, nDTR_TXEN pin operate as nRTS, nDTR. And
as
nDTR.
And
each
of
nTXRDY_TXEN,