CS5535 datasheet(12/555 Pages) NSC

12 / 555 page

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Architecture Overview

The Geode™ CS5535 provides interfaces for all the com-

mon peripherals of an information appliance, plus offers

expansion for additional needs, if required. Featuring a

33/66 MHz PCI interface to the GX2, the I/O companion is

internally connected using the GeodeLink™ packet archi-

tecture. This architecture supports multiple simultaneous

transactions and is totally transparent to all application soft-

ware. GeodeLink architecture related operations are man-

aged via Model Specific Registers (MSRs) that are detailed

in Section 3.1.6 "Address Spaces and MSRs" on page 52.

As shown in Figure 1-1, the CS5535 is implemented with

one GeodeLink Interface Unit (GLIU) that connects to the:

• GeodeLink PCI South Bridge

• GeodeLink Control Processor

• ATA-5 Controller (IDE Controller multiplexed with Flash

Interface)

• Universal Serial Bus 1 Controller with Ports 1-1 and 1-2

• Universal Serial Bus 2 Controller with Ports 2-1 and 2-2

• Audio Codec 97 (AC97) Controller

• Diverse Device

— Legacy DMA, Timer, and Interrupt (82xx PC Legacy)

— UARTs (2) and IR (1) Port (shared with UART1)

— System Management Bus (SMB) Controller

— Low Pin Count (LPC) Controller

— General Purpose I/O (GPIO) with Input Conditioning

Functions (ICF)

— Multi-Function General Purpose Timers (MFGPTs)

— Flash Interface (multiplexed with IDE interface)

— Real-Time Clock (RTC) with CMOS RAM

Power Management Controller (PMC)The Low Voltage

Detect (LVD) circuit is not a GeodeLink Device (GLD) but is

connected to the Power Management Controller for voltage

monitoring support.

Figure 1-1. Internal Block Diagram

GeodeLink™ PCI

South Bridge

Geode™ GX2 Interface

PCI

GeodeLink™ Control

Processor (GLCP)

Test/Reset

Interface

AC97 Controller

External

Audio

ATA-5 Controller

USB Controller #1

USB Controller #2

33 or 66 MHz

Flash

Interface

82xx PC

Legacy

MFGP

Timers

RTC &

CMOS RAM

UART (2)

& IR (1)

SMB

Controller

LPC

Port

Power

Mgmnt

External USB

Ports 1-1 & 1-2

External USB

Ports 2-1 & 2-2

GeodeLink™

Interface

Unit

External

IDE/Flash

GPIO

Diverse Integration Logic (DIVIL)

Diverse

Device (DD)

Low Voltage

Detect (LVD)

System Power

Voltages

Power Good

for Power On

Reset (POR)

(GLPCI_SB)

(GLIU)

(USBC1)

(USBC2)

(ACC)

(ATAC)

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