CIRCC Ver la hoja de datos (PDF) - SMSC -> Microchip

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CIRCC

Consumer Infrared Communications Controller

SMSC -> Microchip 

NAME

DMA Channel

IRQ Level

Software Select A

Software Select B

Table 6 - CIrCC-Specific Chip-Level Controls

SIZE (BITS)

TYPE

DESCRIPTION

4

Input

ISA DMA Channel Number

4

Input

ISA Interrupt Level

8

Input

Software Programmable Register A

8

Input

Software Programmable Register B

DMA Channel

4 bit bus from a chip-level configuration register,

used to identify the current CIrCC DMA channel

number. The value appears in the upper nibble

of CIrCC Register Block Three, Address Four.

IRQ Level

4 bit bus from a chip-level configuration register,

used to identify the current CIrCC IRQ level. The

value appears in the lower nibble of CIrCC

Register Block Three, Address Four.

Software Select A/B

The 8 bit Software Select A and Software Select

B inputs come from software-only programmable

chip-level configuration controls. The values on

these buses appear in CIrCC Register Block

Three, Addresses Five and Six.

8

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