SB16C1054PCI_Data Sheet_EN

SB16C1054PCI
PCI Target Interface Controller
with Quad-UART
JULY 2013 REV 1.04
47
Table 13–1: Internal Registers Map…continued
Address
A[2:0]
Register
Read/Write
Comments
Page 0 Registers
0h
THR : Transmit Holding Register
RBR : Receive Buffer Register
Write-only
Read-only
LCR[7] = 0, MCR[6] = 0
1h
IER : Interrupt Enable Register
Read/Write
LCR[7] = 0, MCR[6] = 0
2h
FCR : FIFO Control Register
ISR : Interrupt Status Register
Write-only
Read-only
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
3h
LCR : Line Control Register
Read/Write
—
4h
MCR : Modem Control Register
Read/Write
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh,
LCR[7] = 0, MCR[6] = 1
5h
LSR : Line Status Register
Read-only
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
6h
MSR : Modem Status Register
Read-only
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
7h
SPR : Scratch Pad Register
Read/Write
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
Page 1 Registers
0h
DLL : Divisor Latch LSB
Read/Write
LCR[7] = 1, LCR ≠ BFh
1h
DLM : Divisor Latch MSB
Read/Write
LCR[7] = 1, LCR ≠ BFh
2h
FCR : FIFO Control Register
ISR : Interrupt Status Register
Write-only
Read-only
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
3h
LCR : Line Control Register
Read/Write
—
4h
MCR : Modem Control Register
Read/Write
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh,
LCR[7] = 0, MCR[6] = 1
5h
LSR : Line Status Register
Read-only
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
6h
MSR : Modem Status Register
Read-only
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh
7h
SPR : Scratch Pad Register
Read/Write
LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh