Texas Instruments TMS320C2XX User Manual

Page 448

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Register Descriptions

A-13

Register Summary

Asynchronous Serial Port Control Register (ASPCR) — I/O Address FFF5h

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15

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14

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13

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12

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11

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10

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9

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8

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0

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0

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0

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0

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0

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FREE

SOFT

URST

Reserved

DIM

TIM

Immediate stop
Process stops after character completion.
Free run
Free run

0
1

Port in reset
Port enabled

Disables transmit interrupts
Enables transmit interrupts

0
1

Disables delta interrupts
Enables delta interrupts

0
1

0
1
0
1

0
0
1
1

Emulation/run mode

R/W

R/W

R/W

R/W

R/W

Port reset

Delta interrupt mask

Transmit interrupt mask

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7

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6

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5

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4

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3

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2

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1

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0

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0

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0

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0

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0

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0

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0

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0

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0

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RIM

STB

CAD

SETBRK

CIO3

CIO2

CIO1

CIO0

0
1

Disables receive interrupts
Enables receive interrupts

0
1

One stop bit for transmission and reception
Two stop bits for transmission and reception

0
1

Disables auto-baud alignment
Enables auto-baud alignment when ADC = 0

0
1

TX output forced high
TX output forced low

0
1

IO3 configured as input
IO3 configured as output

0
1

IO2 configured as input
IO2 configured as output

0
1

IO1 configured as input
IO1 configured as output

0
1

IO0 configured as input
IO0 configured as output

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Receive interrupt mask

Number of stop bits

Auto-baud alignment

TX pin level between transmissions

IO3 pin configuration

IO2 pin configuration

IO1 pin configuration

IO0 pin configuration

† These reserved bits are always read as 0s. Writes have no effect.

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