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SCI Control Registers
1757
SPNU563A–March 2018
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Serial Communication Interface (SCI) Module
30.7.17 SCI Pin I/O Control Register 4 (SCIPIO4)
Figure 30-26 and Table 30-27 illustrate this register.
Figure 30-26. SCI Pin I/O Control Register 4 (SCIPIO4) [offset = 4Ch]
31 8
Reserved
R-0
7 3 2 1 0
Reserved TX SET RX SET 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 30-27. SCI Pin I/O Control Register 4 (SCIPIO4) Field Descriptions
Bit Field Value Description
31-3 Reserved 0 Reads return 0. Writes have no effect.
2 TX SET Transmit pin set. This bit sets 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 Read: The output on SCITX is at logic low (0).
Write: No effect.
1 Read or write: The output on SCITX is at logic high (1).
1 RX SET Receive pin set. This bit sets the data 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 Read: The output on SCIRX is at logic low (0).
Write: No effect.
1 Read or write: The output on SCIRX is at logic high (1).
0 Reserved 0 Writes have no effect.
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