TMS370 datasheet(33/63 Pages) TI

33 / 63 page

TMS370CxCx

8-BIT MICROCONTROLLER

SPNS040B – NOVEMBER 1995 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

serial communications interface 2 module (continued)

SCI receiver data buffer register (RXBUF)

The RXBUF register contains current data from the receiver shift register. RXBUF is cleared by a system reset.

Table 23. SCI Receiver Data Buffer Register (RXBUF) [Memory Address – 1057h]

Bit #

P057

RXDT7

RXDT6

RXDT5

RXDT4

RXDT3

RXDT2

RXDT1

RXDT0

R–0

R = read, W = write, –

n = value of the bit after the register is reset

SCI transmitter data buffer register (TXBUF)

The TXBUF register is a read/write register that stores data bits to be transmitted by SCITX. Data written to TXBUF

must be right-justified because the left-most bits are ignored for characters less than eight bits long.

Table 24. SCI Transmit Data Buffer Register (TXBUF) [Memory Address – 1059h]

Bit #

P059

TXDT7

TXDT6

TXDT5

TXDT4

TXDT3

TXDT2

TXDT1

TXDT0

RW – 0

R = read, W = write, –

n = value of the bit after the register is reset

SCI port control register 2 (SCIPC2)

The SCIPC2 register controls the SCIRXD and SCITXD pin functions.

Table 25. SCI Port Control Register 2 (SCIPC2) [Memory Address – 105Eh]

Bit #

P05E

SCITXD

DATA IN

SCITXD

DATA OUT

SCITXD

FUNCTION

SCITXD

DATA DIR

SCIRXD

DATA IN

SCIRXD

DATA OUT

SCIRXD

FUNCTION

SCIRXD

DATA DIR

R–0

RW – 0

R–0

RW – 0

R = read, W = write, –

n = value of the bit after the register is reset

Bit 0

SCIRXD DATA DIR (SCIRXD data direction)

This bit determines the data direction on the SCIRXD pin if SCIRXD has been defined as a

general-purpose I/O pin.

0 = SCIRXD pin is a general-purpose input pin.

1 = SCIRXD pin is a general-purpose output pin.

Bit 1

SCIRXD FUNCTION

This bit defines the function of the SCIRXD pin.

0 = SCIRXD pin is a general-purpose digital I/O pin.

1 = SCIRXD pin is the SCI receiver pin.

TMS370 Datasheet(PDF) 33 Page - Texas Instruments

TMS370 Datasheet(HTML) 33 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63

Datasheet Download

Link URL