XR16L580_07 EXAR [Exar Corporation], XR16L580_07 Datasheet - Page 22

• Manufacturer Part Number: XR16L580_07
• Description: SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
• Manufacturer: EXAR [Exar Corporation]

XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
The L580 has a set of configuration registers selected by address lines A0, A1 and A2 with CS# asserted. The
complete register set is shown on
3.0 UART INTERNAL REGISTERS
A2,A1,A0 A
0
0
0
0
0
0
0
1
1
1
1
0
1
1
1
1
0
0 0
0 1
0 0
0 1
0 1
1 0
1 1
0 0
0 1
1 0
1 1
1 0
0 0
0 1
1 0
1 1
0 0
DDRESSES
RHR - Receive Holding Register
THR - Transmit Holding Register
DLL - Div Latch Low Byte
DLM - Div Latch High Byte
DREV - Device Revision Code
DVID - Device Identification Code
IER - Interrupt Enable Register
ISR - Interrupt Status Register
FCR - FIFO Control Register
LCR - Line Control Register
MCR - Modem Control Register
LSR - Line Status Register
Reserved
MSR - Modem Status Register
Reserved
SPR - Scratchpad Register
EFR - Enhanced Function Register
Xon-1 - Xon Character 1
Xon-2 - Xon Character 2
Xoff-1 - Xoff Character 1
Xoff-2 - Xoff Character 2
Table 5
T
ABLE
16C550 C
5: UART INTERNAL REGISTERS
R
and
EGISTER
E
NHANCED
Table 6
OMPATIBLE
22
.
R
EGISTERS
R
EGISTERS
R
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Write-only
Write-only
Write-only
Write-only
EAD
/W
RITE
DLL, DLM = 0x00,
LCR ≠ 0xBF
LCR ≠ 0xBF
LCR ≠ 0xBF
LCR = 0xBF
C
LCR[7] = 0
LCR[7] = 1
LCR[7] = 1
LCR[7] = 0
OMMENTS
REV. 1.4.1