SIO1007 datasheet(64/108 Pages) MICROCHIP

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SIO1007

DS00002020A-page 64

 2005 - 2015 Microchip Technology Inc.

Note 18-6

The CIRTX pin will tristate when this combination is selected. Outputs Inactive: CIRTX is High-Z,

regardless of mode of CIRCC2 and state of CIRCC2 Power Control bit.

18.4.12

CR0B

18.4.13

CR0C

CR0C can only be accessed in the configuration state and after the CSR has been initialized to 0CH. CR0C controls

the operating mode of the UART. This register is reset to the default state by a POR or a hardware reset.

6,7

IRCC2 Output Mux

These bits are used to select IRCC2 Output Mux Mode.

BIT7

BIT6

MUX MODE

Active device to COM port (Default).

This port in not connected. When Serial

Port 2 is inactive (Power Control bit = 0),

then the IRTX2 pin is low.

Active device to IR port. is the IRRX2,

IRTX2 are selected. When Serial Port 2

is inactive (Power Down bit = 0), then

IRTX2 pin is low.

Reserved.

Outputs Inactive: IRTX2 is High-Z,

regardless of mode of UART2 and state

of UART2 Power Control bit.

TABLE 18-11: CR0C

UART Mode

Type: R/W

Default: 0X02 ON VCC POR AND PCI RESET

BIT NO.

BIT NAME

DESCRIPTION

UART 2 RCV

Polarity

0 = RX input active high (default).

1 = RX input active low.

UART 2 XMIT

Polarity

0 = TX output active high.

1 = TX output active low (default).

UART 2 Duplex

This bit is used to define the FULL/HALF DUPLEX operation of UART 2.

1 = Half duplex

0 = Full duplex (default)

3, 4, 5

UART 2 MODE

UART 2 Mode

5 4 3

0 0 0 Standard COM Functionality (default)

0 0 1 IrDA (HPSIR)

0 1 0 Amplitude Shift Keyed IR

0 1 1 Reserved

1 x x Reserved

UART 1 Speed

This bit enables the high speed mode of UART 1.

1 = High speed enabled

0 = Standard (default)

UART 2 Speed

This bit enables the high speed mode of UART 2.

1 = High speed enabled

0 = Standard (default)

TABLE 18-10: CR0A (CONTINUED)

IR MUX

Type: R/W

Default: 0x00 on VTR POR;

00xx0000b VCC POR;

Bits[7:6] = 00 on PCI RESET

BIT NO.

BIT NAME

DESCRIPTION

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