SB16C1054PCI_Data Sheet_EN

SB16C1054PCI
PCI Target Interface Controller
with Quad-UART
JULY 2013 REV 1.04
31
Table 11–4: Interface Information Register 1 Description
Bit
Symbol
Description
7:4
IIR1[7:4]
Interface Type Indicator:
0000b: RS232 interface is selected on 2
nd
port of ALL mode by INTF1[1:0].
0001b: RS422 interface is selected on 2
nd
port of ALL mode by INTF1[1:0].
0010b: RS485 interface is selected on 2
nd
port of ALL mode by INTF1[1:0].
3:2
IIR1[3:2]
Auto Toggling Signal Indicator:
When IIR1[7:4] is 0000b (RS232 interface selected): Meaningless.
When IIR1[7:4] is 0001b or 0010b (RS422 or RS485 interface selected):
00b: RTS signal line selected on 2
nd
port of ALL mode by INTF1[1:0].
01b: DTR signal line selected on 2
nd
port of ALL mode by INTF1[1:0].
10b: TXEN, RXEN# signal line of SB16C1050 selected on 2
nd
port of ALL mode by
INTF1[1:0].
1:0
IIR1[1:0]
Not used. Hardwired to 00b
Table 11–5: Interface Information Register 2 Description
Bit
Symbol
Description
7:4
IIR2[7:4]
Interface Type Indicator:
0000b: RS232 interface is selected on 3
rd
port of ALL mode by INTF2[1:0].
0001b: RS422 interface is selected on 3
rd
port of ALL mode by INTF2[1:0].
0010b: RS485 interface is selected on 3
rd
port of ALL mode by INTF2[1:0].
3:2
IIR2[3:2]
Auto Toggling Signal Indicator:
When IIR2[7:4] is 0000b (RS232 interface selected): Meaningless.
When IIR2[7:4] is 0001b or 0010b (RS422 or RS485 interface selected):
00b: RTS signal line selected on 3
rd
port of ALL mode by INTF2[1:0].
01b: DTR signal line selected on 3
rd
port of ALL mode by INTF2[1:0].
10b: TXEN, RXEN# signal line of SB16C1050 selected on 3
rd
port of ALL mode by
INTF2[1:0].
1:0
IIR2[1:0]
Not used. Hardwired to 00b
Table 11–6: Interface Information Register 3 Description
Bit
Symbol
Description
7:4
IIR3[7:4]
Interface Type Indicator:
0000b: RS232 interface is selected on 4
th
port of ALL mode by INTF3[1:0].
0001b: RS422 interface is selected on 4
th
port of ALL mode by INTF3[1:0].
0010b: RS485 interface is selected on 4
th
port of ALL mode by INTF3[1:0].
3:2
IIR3[3:2]
Auto Toggling Signal Indicator:
When IIR3[7:4] is 0000b (RS232 interface selected): Meaningless.
When IIR3[7:4] is 0001b or 0010b (RS422 or RS485 interface selected):
00b: RTS signal line selected on 4
th
port of ALL mode by INTF3[1:0].
01b: DTR signal line selected on 4
th
port of ALL mode by INTF3[1:0].
10b: TXEN, RXEN# signal line of SB16C1050 selected on 4
th
port of ALL mode by
INTF3[1:0].
1:0
IIR3[1:0]
Not used. Hardwired to 00b