CIRCC datasheet(9/70 Pages) SMSC

9 / 70 page

Table 7 - Legacy Chip-Level Controls

NAME

SIZE (BITS)

TYPE

DESCRIPTION

Tx Polarity

Input

Output Mux. Transmit Polarity

Rx Polarity

Input

Output Mux. Receive Polarity

Half Duplex

Input

16C550A UART Half Duplex

Control

IR Half Duplex Timeout

Input

IR Transceiver Turnaround Time

IR Mode

Input

IR Mode Register Bits

IR Location

Input

IR Option Register Location Bits

Tx Polarity

Typically part of a 16C550A Serial Port Option

The value also appears in CIrCC

Rx Polarity

Typically part of a 16C550A Serial Port Option

The value also appears in CIrCC

Half Duplex

Typically part of a 16C550A Serial Port Option

The value also appears in CIrCC

IR Half Duplex Timeout

Typically part of a 16C550A Serial Port 2

Configuration Register. The value also appears

in CIrCC Register Block One, Address Zero.

IR Mode

Typically part of a 16C550A Serial Port Option

These values are also part of the

CIrCC Block Control bits 3-5, Register Block

One, Address Zero.

IR Location

Typically part of a 16C550A Serial Port IR Option

These values are the CIrCC Output

Mux bits, Register Block One, Address One.

Note:

These legacy controls are uniformly

updated in the CIrCC and the Top-Level Device

Configuration Registers only when either set of

registers is explicitly written using IOW or

following a device-level POR.

CIrCC software

resets will not affect the legacy bits.

CIRCC Datasheet(PDF) 9 Page - SMSC Corporation

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