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IRCC 数据表(PDF) 7 Page - SMSC Corporation

部件名 IRCC
功能描述  INFRARED COMMUNICATIONS CONTROLLER
PDF  79 Pages
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制造商  SMSC [SMSC Corporation]
网页  http://www.smsc.com
标志 SMSC - SMSC Corporation

IRCC 数据表(HTML) 7 Page - SMSC Corporation

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Table 7 - IRCC-Specific Chip-Level Controls
NAME
SIZE (BITS)
TYPE
DESCRIPTION
DMA Channel
4
Input
ISA DMA Channel Number
IRQ Level
4
Input
ISA Interrupt Level
DMA Channel
4-bit bus from a chip-level configuration register,
used to identify the current IrCC DMA channel
number. The value appears in the upper nibble
of IrCC Register Block Three, Address Four.
IRQ Level
4-bit bus from a chip-level configuration register,
used to identify the current IrCC IRQ level. The
value appears in the lower nibble of IrCC
Register Block Three, Address Four.
Table 8 - Legacy Chip-Level Controls
NAME
SIZE (BITS)
TYPE
DESCRIPTION
Tx Polarity
1
Input
Output Mux. Transmit Polarity
Rx Polarity
1
Input
Output Mux. Receive Polarity
Half Duplex
1
Input
16550A UART Half Duplex Control
IR Mode
3
Input
IR Mode Register Bits
IR Location
2
Input
IR Option Register Location Bits
Tx Polarity
Typically part of a 16550A Serial Port Option
Register.
The value also appears in IrCC
Register Block One, Address Zero.
Rx Polarity
Typically part of a 16550A Serial Port Option
Register.
The value also appears in IrCC
Register Block One, Address Zero.
Half Duplex
Typically part of a 16550A Serial Port Option
Register.
The value also appears in IrCC
Register Block One, Address Zero.
IR Mode
Typically part of a 16550A Serial Port Option
Register. These values are also part of the IrCC
Block Control bits 3-5, Register Block One,
Address Zero.
IR Location
Typically part of a 16550A Serial Port IR Option
Register. These values are the IrCC Output Mux
bits, Register Block One, Address One.
NOTE: These legacy controls are uniformly
updated in the IrCC and the Top-level Device
Configuration Registers only when either set of
registers are explicitly written using IOW or
following a device-level POR.
IrCC software
resets will not affect the legacy bits.



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