DataSheet_SB16C1053APCI_v106

SB16C1053APCI
PCI Target Controller with 2 Serial, 1 Parallel and MIO Bus
PCI to 2S+1P with MIO Bus Bridge
JULY 2013 REV 1.06
41
10.10 Parallel Port FIFO TX Threshold Register (PPFTTR, BAR4+14h)
Select the TX FIFO threshold of Parallel Port in ECP mode.
Table 10–9: Parallel Port FIFO TX Threshold Register Description
Bit
Symbol
Description
7:4
PPFTTR[7:4]
Reserved.
3:0
PPFTTR[3:0]
Select TX FIFO threshold of Parallel Port in ECP from 0 to 15.
10.11 Parallel Port FIFO RX Threshold Register (PPFRTR, BAR4+15h)
Select the RX FIFO threshold of Parallel Port in ECP mode.
Table 10–10: Parallel Port FIFO RX Threshold Register Description
Bit
Symbol
Description
7:4
PPFRTR[7:4]
Reserved.
3:0
PPFRTR[3:0]
Select RX FIFO threshold of Parallel Port in ECP from 0 to 15.
10.12 Auto Toggle Pin Select Register (ATPSR, BAR4+16h)
Select a pin for auto toggle function among DTR#, RTS# and TXEN/RXEN#.
Table 10–11: Auto Toggle Pin Select Register Description
Bit
Symbol
Description
7:2
ATPSR[7:2]
Reserved. Hardwired to ‘000000’
1:0
ATPSR[1:0]
00b : Auto Toggle function is disabled. (default)
In this case, DTR# works as Data Terminal Ready, RTS# as Request To Send,
TXEN as TXRDY#(TX Data Ready) and RXEN# as RXRDY#(RX Data Ready).
01b : Use DTR# as Auto Toggle pin for RS422 and RS485.
In this case, DTR# works as the auto toggle pin, TXEN.
TXEN works as TXRDY#(TX Data Ready) and RXEN# as RXRDY#(RX Data
Ready).
10b : Use RTS# as Auto Toggle pin for RS422 and RS485.
In this case, RTS# works as the auto toggle pin, TXEN.
TXEN works as TXRDY#(TX Data Ready) and RXEN# as RXRDY#(RX Data
Ready).
11b : Use TXEN and RXEN# as Auto Toggle pin for RS422 and RS485.
These two pins are dedicated pins for auto toggle function.
In this case, DTR# works as Data Terminal Ready, RTS# as Request To Send.