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MMC2107 - Freescale Semiconductor

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<strong>Freescale</strong> <strong>Semiconductor</strong>, Inc.<br />

Serial Communications Interface Modules (SCI1 and SCI2)<br />

16.7.9 SCI Data Direction Register<br />

Address: SCI1 — 0x00cc_000a<br />

SCI2 — 0x00cd_000a<br />

Bit 7 6 5 4 3 2 1 Bit 0<br />

Read:<br />

Write:<br />

RSVD7 RSVD6 RSVD5 RSVD4 RSVD3 RSVD2 DDRSC1 DDRSC0<br />

nc...<br />

<strong>Freescale</strong> <strong>Semiconductor</strong>, I<br />

NOTE:<br />

Reset: 0 0 0 0 0 0 0 0<br />

Figure 16-12. SCI Data Direction Register (SCIDDR)<br />

Read: Anytime<br />

Write: Anytime<br />

RSVD[7:2] — Reserved<br />

Writing to these read/write bits updates their values but has no effect<br />

on functionality.<br />

DDRSC[1:0] — SCIPORT Data Direction Bits<br />

These bits control the data direction of the SCIPORT pins. Reset<br />

clears DDRSC[1:0].<br />

1 = Corresponding pin configured as output<br />

0 = Corresponding pin configured as input<br />

When LOOPS = 0 and TE = RE = 1, the RXD pin is an input and the<br />

TXD pin is an output regardless of the state of the DDRSC1 (TXD) and<br />

DDRSC0 (RXD) bits.<br />

Technical Data <strong>MMC2107</strong> – Rev. 2.0<br />

348 Serial Communications Interface Modules (SCI1 and SCI2) MOTOROLA<br />

For More Information On This Product,<br />

Go to: www.freescale.com

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