Texas Instruments TMS570LC4357 User Manual

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SPNU563A–March 2018
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Serial Communication Interface (SCI) Module
30.7.12.3 Transmit Data Buffer Register (SCITD)
Data to be transmitted is written to the SCITD register. Figure 30-21 and Table 30-20 illustrate this
register.
Figure 30-21. Transmit Data Buffer Register (SCITD) [offset = 38h]
31 16
Reserved
R-0
15 8 7 0
Reserved TD
R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 30-20. Transmit Data Buffer Register (SCITD) Field Descriptions
Bit Field Value Description
31-8 Reserved 0 Reads return 0. Writes have no effect.
7-0 TD 0-FFh Transmit data. Data to be transmitted is written to the SCITD register. The transfer of data from
this register to the transmit shift register SCITXSHF sets the TXRDY flag (SCIFLR[8]), which
indicates that SCITD is ready to be loaded with another byte of data.
Note: If SET TX INT bit (SCISETINT[8] is set, this data transfer also causes an interrupt.
NOTE: Data written to the SCITD register that is fewer than eight bits long must be right-justified,
but it does not need to be padded with leading zeros.
30.7.13 SCI Pin I/O Control Register 0 (SCIPIO0)
Figure 30-22 and Table 30-21 illustrate this register.
Figure 30-22. SCI Pin I/O Control Register 0 (SCIPIO0) [offset = 3Ch]
31 8
Reserved
R-0
7 3 2 1 0
Reserved TX FUNC RX FUNC 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 30-21. SCI Pin I/O Control Register 0 (SCIPIO0) Field Descriptions
Bit Field Value Description
31-3 Reserved 0 Reads return 0. Writes have no effect.
2 TX FUNC Transfer function. This bit defines the function of pin SCITX.
0 SCITX is a general-purpose digital I/O pin.
1 SCITX is the SCI transmit pin.
1 RX FUNC Receive function. This bit defines the function of pin SCIRX.
0 SCIRX is a general-purpose digital I/O pin.
1 SCIRX is the SCI receive pin.
0 Reserved 0 Writes have no effect.

Texas Instruments TMS570LC4357 Specifications

General

Brand	Texas Instruments
Model	TMS570LC4357
Category	Microcontrollers
Language	English