xr16m554 Exar Corporation, xr16m554 Datasheet - Page 19

• Manufacturer Part Number: xr16m554
• Description: 1.62v To 3.63v Quad Uart With 16-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
Each UART channel in the M554 has its own set of configuration registers selected by address lines A0, A1
and A2 with a specific channel selected (See
Table 7
3.0 UART INTERNAL REGISTERS
A2,A1,A0 A
and
0 0 0
0 0 1
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
Table
DDRESSES
8.
T
ABLE
RHR - Receive Holding Register
THR - Transmit Holding Register
DLL - Divisor LSB
DLM - Divisor MSB
IER - Interrupt Enable Register
ISR - Interrupt Status Register
FCR - FIFO Control Register
LCR - Line Control Register
MCR - Modem Control Register
LSR - Line Status Register
MSR - Modem Status Register
SPR - Scratch Pad Register
7: UART CHANNEL A AND B UART INTERNAL REGISTERS
16C550 C
R
EGISTER
Table 1
OMPATIBLE
19
and
1.62V TO 3.63V QUAD UART WITH 16-BYTE FIFO
R
Table
EGISTERS
2). The complete register set is shown on
R
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read-only
Write-only
Read-only
Write-only
Read-only
Read-only
EAD
/W
RITE
LCR[7] = 1, LCR ≠ 0xBF
XR16M554/554D
C
LCR[7] = 0
LCR[7] = 0
LCR[7] = 0
OMMENTS