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www.diodes.com

April 2019

Diodes Incorporated

PI7C9X760

Document Number DS40305 Rev 6-2

A product Line of

Diodes Incorporated

PI7C9X760

Offset 06H: Transmitter FIFO Data counter Register (TFD). Accessible when LCR=0xBF and SFR[2]=1. De-

fault=00

Bit

Type

Description

[7:0]

RO

Indicated the amount of data in TX FIFO

Offset 07H: Special Function Register(SFR). Accessible when LCR=0xBF and SFREN==0x5A. Default=00

Bit

Type

Description

7

RW

If set, Crystal feedback resistor disable

6

RW

RFD/LSR counter select

0 = Receive FIFO Data Counter is selected

1 = Line Status Error Counter is selected

5

RW

Reserved

4

RW

Registers burst R/W enable if set

3

RW

Enable the loopback from RX to TX internally

2

RW

Special Register Access Enable when set, registers(CPR,ISCR,TIDLE,TRCTL) are accessible.

1

RW

Auto DSR and DTR Flow Control enable

0 = Auto DSR and DTR Flow Control is disabled

1 = Auto DSR and DTR Flow Control is enabled

0

RW

If set, forces transmitter to always to transmit data

Offset 08H: Transmit Idle Time Count Register (TIDLE). Accessible when LCR=0xBF and SFR[2]=1. Default=00

Bit

Type

Description

[7:0]

RW

Transmit Idle Time control.

Offset 09H: TX/RX Control Register (SCR/TRCTL). Accessible when LCR=0xBF and SFR[2]=1. Default=06

Bit

Type

Description

[7:4]

RW

SCR - Sample Clock value used in the Baud Rate Generator.

Baud Rate = XIN / (DL * 2 ** (M+2*MCR[7]-1) * (16-SCR+N))

3

RW

Transmit In-band Xon enable

2

RW

TX Empty Interrupt enable

1

RW

RX Timeout enable

0

RW

TX Idle insertion enable

Configuration Registers cont..

Note: When IrDA mode is enabled, the setting in register SCR(bit 7-3 of 09H) and N(bit 3-0 of CPR should meet: SCR=N or (16-SCR+N) > 1.