SB16C1054PCI_Data Sheet_EN

SB16C1054PCI
PCI Target Interface Controller
with Quad-UART
JULY 2013 REV 1.04
30
11.4 General Information Register3 – Core Version (GIR3)
General Information Register3 indicates SystemBase’s PCI Target Interface Core version (Currently
24h meaning 2.4)
11.5 Software Reset Register
If 52h(“R”) is written on SRR, Reset is outputted to Serial Multi-Port I/O Bus and this means PCI UART
goes to Reset state. If values other than 52h are written on SRR, Reset state is cleared.
11.6 Device Information Register (DIR)
DIR: Device information of Port1 ~ Port4
Table 11–2: Device Information Register Description
Bit
Symbol
Description
7:4
DIR[7:4]
UART Select: Content of U[2:0] shows type of UART.
000b: 16C550 compatible UART
001b: 16C1050
010 ~ 111b: Not supported
3:0
DIR[3:0]
Oscillator Frequency Select: O[3:0] shows frequency (maximum
communication speed) of communication modification sender that is used.
0000b: 1.8432MHz (115.2Kbps) 0001b: 3.6864MHz (230.4Kbps)
0010b: 7.3728MHz (460.8Kbps) 0011b: 14.7456MHz (921.6Kbps)
0100b: 29.4912MHz (1,8432.2Kbps) 0101b: 58,9842MHz (3,6864.4Kbps)
0110 ~ 1111b: Not supported
11.7 Interface Information Register0 ~ 3 (IIR0 ~ 3)
IIR0 indicates interface information for Serial 4-port mode.
Table 11–3: Interface Information Register 0 Description
Bit
Symbol
Description
7:4
IIR0[7:4]
Interface Type Indicator:
0000b: RS232 interface is selected by INTF0[1:0] on serial 4-port mode and ALL mode.
0001b: RS422 interface is selected by INTF0[1:0] on serial 4-port mode and ALL mode.
0010b: RS485 interface is selected by INTF0[1:0] on serial 4-port mode and ALL mode.
3:2
IIR0[3:2]
Auto Toggling Signal Indicator:
When IIR0[7:4] is 0000b (RS232 interface selected): Meaningless.
When IIR0[7:4] is 0001b or 0010b (RS422 or RS485 interface selected):
00b: RTS signal line selected by TRXSEL[1:0] on serial 4-port and ALL mode.
01b: DTR signal line selected by TRXSEL[1:0] on serial 4-port and ALL mode.
10b: TXEN, RXEN# signal line selected by TRXSEL[1:0] on serial 4-port and ALL mode.
1:0
IIR0[1:0]
Not used. Hardwired to 00b