Companion Device 208-Pin BGA

The AMD Geode CS5535 companion device is designed to work with an integrated processor North Bridge component such as an AMD Geode GX processor (i.e., Geode GX 533@1.1W processor, Geode GX 500@1.0W processor, and Geode GX 466@0.9W processor). Together, the Geode GX processor and Geode CS5535 companion device provide a system-level solution well suited for the high-performance and low-power needs of a host of information appliances that include digital set-top boxes, personal access devices, and thin client applications. The internal architecture has been greatly simplified over previous AMD Geode companion devices by use of a single, high-performance modular structure based on GeodeLink architecture. This architecture yields high internal speed (over 4 GB/s) data movement and extremely versatile internal power management. The GeodeLink architecture is transparent to application software. Communication with the Geode GX processor is over a 33/66 MHz PCI bus. The CS5535 incorporates many I/O functions, including those found in typical SuperI/O chips, simplifying many system designs. Since the graphics subsystem is entirely contained in the Geode GX processor, system interconnect is simplified. The device contains state-of-the-art power management that enables systems, especially battery powered systems, to significantly reduce power consumption. Audio is supported by an internal controller, designed to connect to multiple AC97 compatible codecs. An IR (infrared) port supports all popular IR communication protocols. The IR port is shared with one of two industry-standard serial ports that can reach speeds of 115.2 kbps. An LPC (low pin count) port is provided to facilitate connections to a SuperI/O should additional expansion, such as a floppy drive, be necessary, and/or to an LPC ROM for the system BIOS. The hard disk controller is an ATA-5 compatible bus mastering IDE controller; includes support for two ATA-compliant devices on one channel. Two dual-port USBs (universal serial buses, USB specification v1.1 compliant) provide four ports with both low and full-speed capabilities for Plug & Play expansion for a variety of consumer peripheral devices such as a keyboard, mouse, printer, and digital camera. A battery-backed RTC (real-time clock) keeps track of time and provides calendar functions. A suite of 82xx devices provide the legacy PC functionality required by most designs, including two PICs (programmable interrupt controllers), one PIT (programmable interval timer) with three channels, and DMA (direct memory access) functions. The Geode CS5535 companion device contains eight MFGPTs (multi-function general purpose timers) that can be used for a variety of functions. A number of GPIOs (general purpose input/outputs) are provided, and are assigned to system functions on power-up (i.e., LPC port); each of these may be reassigned and given different I/O characteristics such as debounce, edge-triggering, etc. State-of-the-art power management features are attained with the division of the device into two internal power domains. The GPIOs and multi-function timers are distributed into each of the two domains to allow these to act as wakeup sources for the device. In addition to full ACPI (Advanced Configuration Power Interface) compliance and support of industry-standard Wakeup and Sleep modes, the device automatically disables clocks from internal blocks when they are not being used.

• GeodeLink master burst reads and writes Audio Codec 97 (AC97) Controller
• 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 Diverse Device
• 82xx Legacy Devices:
  • Two 8259A-equivalent PICs: – Shadow registers allow reading of internal registers
  • One 8254-equivalent PIT
  • Two 8237A-equivalent DMA controllers: – 8-bit DMA supported (only)
  • Serial Ports 1 and 2: – Port 1 is shared with an IR port – 16550A and 16450 software compatible – Shadow register support for write-only bit monitoring – UART data rates up to 115.2 kbps
• 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/demodulation (Sharp-IR)
  • ASK-IR option of SHARP-IR
  • DASK-IR option of SHARP-IR
  • Consumer Remote Control supports RC-5, RC-6, NEC, RCA, and RECS 80
• System Management Bus (SMB) Controller:
  • Compatible with Intel System Management Bus, Phillips I2C, and ACCESS.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
• General Purpose I/Os (GPIOs):
  • Programmable: In, Out, I/O, Open-Drain, PullUp/Down, and Invert
  • Parallel bit read and write
  • Individual bit access eliminates Read-Modify-Write cycles
  • Input Conditioning Functions (ICF): – Input debounce/filter
  • Input event counter
  • Input edge detect
• Multi-Function General Purpose Timers (MFGPTs):
  • Eight MFGPTs - two are multiplexed with GPIOs for external usage
  • Two MFGPTs are powered by Standby power and can be used as wakeups
  • 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 the week, date of month, months, years and century, with automatic leap-year adjustment
  • Battery backed-up time of day in seconds, minutes, and hours that allows a 12 or 24 hour format and adjustments for daylight savings time
  • BCD or binary format for time keeping
  • DS1287, MC146818, and PC87911 compatibility
  • Selective lock mechanisms for the RTC RAM
  • Real-time alarm
  • VBAT or VSTANDBY power sources with automatic switching between them
  • 242 bytes of battery-backed CMOS RAM in two banks