FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 83

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

ADDR = 0
DLAB = 0
ADDR = 0
DLAB = 0
ADDR = 1
DLAB = 0
ADDR = 2
ADDR = 2
ADDR = 3
ADDR = 4
ADDR = 5
ADDR = 6
ADDR = 7
ADDR = 0
ADDR = 1
DLAB = 1
*DLAB is Bit 7 of the Line Control Register (ADDR = 3).
Note 1: Bit 0 is the least significant bit. It is the first bit serially transmitted or received.
Note 2: When operating in the XT mode, this bit will be set any time that the transmitter shift
DLAB = 1
ADDRESS*
REGISTER
register is empty.
TABLE 37 - REGISTER SUMMARY FOR AN INDIVIDUAL UART CHANNEL
Receive Buffer Register (Read Only)
Transmitter Holding Register (Write
Only)
Interrupt Enable Register
Interrupt Ident. Register (Read Only)
FIFO Control Register (Write Only)
Line Control Register
MODEM Control Register
Line Status Register
MODEM Status Register
Scratch Register (Note 4)
Divisor Latch (LS)
Divisor Latch (MS)
REGISTER NAME
83
REGISTER
SYMBOL
(Note 7)
MCR
MSR
RBR
THR
FCR
SCR
DLM
LCR
LSR
DDL
IER
IIR
Data Bit 0
(Note 1)
Data Bit 0
Enable
Received
Data
Available
Interrupt
(ERDAI)
"0" if
Interrupt
Pending
FIFO
Enable
Word
Length
Select Bit 0
(WLS0)
Data
Terminal
Ready
(DTR)
Data Ready
(DR)
Delta Clear
to Send
(DCTS)
Bit 0
Bit 0
Bit 8
BIT 0
Data Bit 1
Data Bit 1
Enable
Transmitter
Holding
Register
Empty
Interrupt
(ETHREI)
Interrupt ID Bit
RCVR FIFO
Reset
Word Length
Select Bit 1
(WLS1)
Request to
Send (RTS)
Overrun Error
(OE)
Delta Data Set
Ready
(DDSR)
Bit 1
Bit 1
Bit 9
BIT 1