cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 371
cs5535
Manufacturer Part Number
cs5535
Description
Geode Cs5535 Companion Multi-function South Bridge
Manufacturer
National Semiconductor Corporation
Datasheet
1.CS5535.pdf
(555 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
cs5535-KSZ
Manufacturer:
CIRRUSLOGIC
Quantity:
20 000
Part Number:
cs5535-UDC
Manufacturer:
AMD
Quantity:
20 000
Part Number:
cs5535-UDCF
Manufacturer:
AMD
Quantity:
20 000
- Current page: 371 of 555
- Download datasheet (4Mb)
Revision 0.8
UART/IR Controller Register Descriptions
EIR, Non-Extended Mode (EXCR1.EXT_SL = 0)
In non-extended UART mode, the functional block prioritizes interrupts into four levels. The EIR indicates the highest level
of interrupt that is pending. See Table 5-33 for the encoding of these interrupts.
Bits[3:0]
Bit
7:6
5:4
2:1
0001
0110
0100
1100
0010
0000
EIR
3
0
FEN1
7
Name
FEN[1:0]
RSVD
RXFT
IPR[1:0]
IPF
N/A
Highest
Second
Second
Third
Fourth
Priority
Level
FEN0
6
Interrupt Type
None
Link Status
Receiver High
Data Level Event
RX_FIFO Timeout
Transmitter Low
Data Level Event
Modem Status
Table 5-33. EIR Non-Extended Mode Interrupt Priorities
Description
FIFOs Enabled.
00: No FIFO enabled (Default).
11: FIFOs enabled (bit 0 of FCR = 1).
01, 10: Reserved.
Reserved. Write to 0.
RX_FIFO Timeout. In the 16450 mode, this bit is always 0. In the 16550 mode (FIFOs
enabled), this bit is set to 1 when an RX_FIFO read timeout has occurred and the associ-
ated interrupt is currently the highest priority pending interrupt.
Interrupt Priority. When bit 0 (IPF) is 0, these bits indicate the pending interrupt with the
highest priority. (Default = 00). See Table 5-33.
Interrupt Pending Flag.
0: Interrupt pending.
1: No interrupt pending (Default).
EIR Non-Extended Mode Bit Descriptions
5
EIR Non-Extended Mode Register Map
RSVD
Interrupt Source
None
Parity error, framing error, data over-
run or break event.
Receiver Holding Register (RXD) is
full, or RX_FIFO level is equal to or
above the threshold.
At least one character is in the
RX_FIFO, and no character has
been input to or read from the
RX_FIFO for four character times.
Transmitter Holding Register or
TX_FIFO empty.
Any transition on CTS, DSR or DCD
or a high-to-low transition on RI.
4
371
(Continued)
RXFT
3
IPR1
2
Interrupt Reset Control
N/A
Read Link Status Register (LSR).
Reading the RXD or RX_FIFO
level drops below threshold.
Reading the RXD port.
Reading the Event Identification
Register (EIR) if this interrupt is
currently the highest priority
pending interrupt, or writing into
the TXD port.
Reading the Modem Status Reg-
ister (MSR).
IPR0
1
www.national.com
IPF
0
Related parts for cs5535
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Freescale Semiconductor Technical Data
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinum Tm Fractional N Rf / Integer N If Dual Low Power Frequency Synthesizer
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinum? 2.0 Ghz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinumtm 160 Mhz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Dual N-channel Enhancement Mode Field Effect Transistor
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Video Amplifier System (obsolete)
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Synchronous Step-up DC/DC Converter For White Led Applications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
CLC420 - High Speed, Voltage Feedback op Amp, Package: Lcc, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Monolithic Triple 4.5 CRT Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Differential Video Amplifier
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
ADC10061 - 10-Bit 600 NS A/D Converter With Input Multiplexer And Sample/Hold, Package: Soic Wide, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
DS36277 - Dominant Mode Multipoint Transceiver, Package: Soic Narrow, Pin Nb=8
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Printer Solenoid Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Quad High Speed Trapezoidal Bus Transceiver
Manufacturer:
National Semiconductor Corporation
Datasheet: