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SCI Control Registers

29.7.16 SCI Pin I/O Control Register 3 (SCIPIO3)

Figure 29-25 and Table 29-26 illustrate this register.

Figure 29-25. SCI Pin I/O Control Register 3 (SCIPIO3) [offset = 48h]

31 8

Reserved

R-0

7 3 2 1 0

Reserved TX OUT RX OUT 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 29-26. SCI Pin I/O Control Register 3 (SCIPIO3) Field Descriptions

Bit Field Value Description

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

2 TX OUT Transmit pin out. This pin specifies the logic to be output on pin SCITX if the following conditions are

met:

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

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

See Table 29-23 for an explanation of this bit’s effect in combination with other bits.

0 The output on the SCITX is at logic low (0).

1 The output on the SCITX pin is at logic high (1). (Output voltage is V

or higher if TXPDR = 0 and

output is in high impedance state if TXPDR = 1)

1 RX OUT Receive pin out. This bit specifies the logic to be output on pin SCIRX if the following conditions are

met:

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

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

See Table 29-24 for an explanation of this bit’s effect in combination with the other bits.

0 The output on the SCIRX pin is at logic low (0).

1 The output on the SCIRX pin is at logic high (1). (Output voltage is V

or higher if RXPDR = 0, and

output is in high impedance state if RXPDR = 1)

0 Reserved 0 Writes have no effect.

1477

SPNU562–May 2014 Serial Communication Interface (SCI) Module

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