CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 137

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

UART and IR Port
5.12
The UART and IR Port (UART/IR Controller) is an
enhanced serial port with fast IR (infrared). The UART/IR
Controller provides advanced, versatile serial communica-
tions features with IR capabilities and supports:
• UART (Section 5.12.1.1 "UART Mode" on page 140)
• Sharp-IR (Section 5.12.1.2 "Sharp-IR Mode" on page
• IrDA 1.0 SIR (Section 5.12.1.3 "SIR Mode" on page 140)
• Consumer Electronic IR (CEIR); also called TV Remote
In UART mode, the functional block can act as a standard
16450 or 16550, or in extended mode.
Existing 16550-based legacy software is completely and
transparently supported. Organization and specific fall-
back mechanisms switch the functional block to 16550
compatibility mode upon reset, or when initialized by 16550
software.
This functional block has two DMA channels, of which the
device can use one or both. One channel is required for IR-
based applications, since IR communication works in half-
duplex fashion. Two channels are normally needed to han-
dle high-speed, full duplex, UART-based applications.
AMD Geode™ CS5535 Companion Device Data Book
140)
or Consumer remote control (Section 5.12.1.4 "CEIR
Mode" on page 141)
Interrupt Controller
MSR_CONFIG
UART and IR Port
MSR_RSVD
MSR_MOD
MSR_DON
Virtual Dongle
IRQ
Interface
DMA Controller
Local Bus to SuperI/O Bus Converter and Control Logic
Modem/Control Signals
Figure 5-34. UART/IR Overview Diagram
IRSL0_DS
IRSL[2:0]
ID[3:0]
Local Bus Interface
Microprocessor
UART/IR Controller
Master Bus
Figure 5-34 shows the serial port connections to the
peripheral devices and host, as well as the device configu-
ration.
Features
• Fully compatible with 16550 and 16450 devices (except
• Extended UART mode
• Sharp-IR
• IrDA 1.0 SIR with up to 115.2 kbaud data rate
• Consumer-IR mode
• UART mode data rates up to 1.5 Mbps
• Full duplex infrared frame transmission and reception
• Transmit deferral
• Automatic fallback to 16550 compatibility mode
• Selectable 16 and 32 level FIFOs
• 12-bit timer for infrared protocol support
• DMA handshake signal routing for either 1 or 2 channels
• Support for power management
• Virtual dongle interface
IRTX
modem)
Register Bank
IR Interface
Tx and Rx UART/IR Logic
IRRX1
SuperI/O Bus and
31506B
DMA Interface
UART Interface
SOUT
CCU
BUSY
MHZ48_CLK
SIN
137