cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 3

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
Features
Audio Codec 97 (AC97) Controller
Diverse Device
AC97 specification v2.1 compliant interface to multiple
audio codecs: Serial In, Serial Out, Sync Out, Bit Clock
In
Legacy “PC Beep” support
Eight-channel buffered GeodeLink mastering interface
ASMI and IRQ support
Multiple codec support
Surround sound support
82xx Legacy Devices:
— Two 8259A-equivalent PICs:
— One 8254-equivalent PIT
— Two 8237A-equivalent DMA controllers:
— Serial Ports 1 and 2:
IR (Infrared) Communication Port:
— Shared with Serial Port 1
— 16550A and 16450 software compatible
— Shadow register support for write-only bit monitoring
— Consumer-IR (TV-Remote) mode
— Data rate up to 115.2 kbps (SIR)
— HP-SIR (same as SIR above)
— Selectable internal or external modulation/demodula-
— ASK-IR option of SHARP-IR
— DASK-IR option of SHARP-IR
— Consumer Remote Control supports RC-5, RC-6,
System Management Bus (SMB) Controller:
— Compatible with Intel System Management Bus,
— Bus master and slave operation
LPC (Low Pin Count) Port:
— Based on Intel LPC Interface specification v1.0
— Serial IRQ support
— Serial DMA support (8-bit only)
— Boot source typically off external LPC
— Supports firmware hub protocol
— External bus masters not supported
– Shadow registers allow reading of internal
– 8-bit DMA supported (only)
– Port 1 is shared with an IR port
– 16550A and 16450 software compatible
– Shadow register support for write-only bit
– UART data rates up to 115.2 kbps
tion (Sharp-IR)
NEC, RCA, and RECS 80
Phillips I
registers
monitoring
(Continued)
2
C, and ACCESS.bus
3
General Purpose I/Os (GPIOs):
— Programmable: In, Out, I/O, Open-Drain, Pull-
— Parallel bit read and write
— Individual bit access eliminates Read-Modify-Write
— Input Conditioning Functions (ICF):
— Input event counter
— Input edge detect
Multi-Function General Purpose Timers (MFGPTs):
— Eight MFGPTs - two are multiplexed with GPIOs for
— Two MFGPTs are powered by Standby power and
— Watchdog timer generates reset, IRQ, ASMI, or NMI
— Pulse Width Modulation (PWM)
— Pulse Density Modulation (PDM)
— Blink
Real-Time Clock (RTC) with CMOS RAM:
— Battery backed-up century calendar in days, day of
— Battery backed-up time of day in seconds, minutes,
— BCD or binary format for time keeping
— DS1287, MC146818, and PC87911 compatibility
— Selective lock mechanisms for the RTC RAM
— Real-time alarm
— V
— 242 bytes of battery-backed CMOS RAM in two
Power Management Controller:
— ACPI (Advanced Configuration Power Interface)
— Supports APM (Advanced Power Management) and
— PME (power management event) from GPIOs and/or
— Working, Sleep, and Standby states
— Wakeup circuits powered by Standby power rails
— Automatic clock-off gating reduces power to inactive
— Flexible power supply controls including On/Off and
— Generic Sleep output controls
— ACPI-compliant four second fail-safe off
— Low-voltage detect function for battery-powered
— Suspend/Acknowledge handshake with GX2
— System over-temperature support
— Low Voltage Detect (LVD) provides Power On Reset
Up/Down, and Invert
cycles
– Input debounce/filter
external usage
can be used as wakeups
the week, date of month, months, years and century,
with automatic leap-year adjustment
and hours that allows a 12 or 24 hour format and
adjustments for daylight savings time
switching between them
banks
specification v2.0 compliant timer and register set
Legacy PM
on-chip sources
while rest of component and system powered off
blocks
Sleep button inputs
applications
(POR) as well as continuous voltage monitoring for
automatic system reset on a low voltage condition
BAT
or V
STANDBY
power sources with automatic
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