SCI Control Registers
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SPNU563A–March 2018
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Serial Communication Interface (SCI) Module
30.7.16 SCI Pin I/O Control Register 3 (SCIPIO3)
Figure 30-25 and Table 30-26 illustrate this register.
Figure 30-25. 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 30-26. SCI Pin I/O Control Register 3 (SCIPIO3) Field Descriptions
Bit Field Value Description
31-3 Reserved 0 Reads return 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 30-23 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
OH
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 30-24 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
OH
or higher if RXPDR = 0, and
output is in high impedance state if RXPDR = 1.)
0 Reserved 0 Writes have no effect.
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