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SCI/LIN Control Registers

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28.7.20 SCI Pin I/O Control Register 6 (SCIPIO6)

Figure 28-49 and Table 28-37 illustrate this register.

Figure 28-49. SCI Pin I/O Control Register 6 (SCIPIO6) (offset = 54h)

31 8

Reserved

R-0

3 2 1 0

Reserved TX PDR RX PDR Reserved

R-0 R/W-0 R/W-0 R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Table 28-37. SCI Pin I/O Control Register 6 (SCIPIO6) Field Descriptions

Bit Field Value Description

31-3 Reserved 0 Read returns 0. Writes have no effect.

2 TX PDR Transmit pin open drain enable. This bit is effective in LIN or SCI mode. This bit enables open-drain

capability in the output pin LINTX if the following conditions are met:

• TX FUNC = 0 (LINTX pin is a general-purpose I/O.)

• TX DIR = 1 (LINTX pin is a general-purpose output.)

0 Open drain functionality is disabled; the output voltage is V

or lower if TXOUT =0 and V

or higher if

TXOUT =1.

1 Open drain functionality is enabled; the output voltage is V

or lower if TXOUT =0 and high impedance

if TXOUT =1.

1 RX PDR Receive pin open train enable. This bit is effective in LIN or SCI mode. This bit enables open-drain

capability in the output pin LINRX if the following conditions are met:

• RX FUNC = 0 (LINRX pin is a general-purpose I/O.)

• RX DIR = 1 (LINRX pin is a general-purpose output.)

0 Open drain functionality is disabled; the output voltage is V

or lower if RXOUT =0 and V

or higher if

RXOUT =1.

1 Open drain functionality is enabled; the output voltage is V

or lower if RXOUT =0 and high impedance

if RXOUT =1.

0 Reserved 0 Writes have no effect.

1426

Serial Communication Interface (SCI)/Local Interconnect Network (LIN) SPNU562–May 2014

Module

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