DSP56857 datasheet(593/662 Pages) FREESCALE

593 / 662 page

Application:

Date:

Programmer:

Sheet

Appendix B - Programmer’s Sheets, Rev. 4

Freescale Semiconductor

B-91

Preliminary

TMR

8 of 11

TMR Control

$1FFE80 + $6, $E,

$16, $1E

Bits

13 12 11 10

Read

PCS

SCS

ONCE

LENGTH

DIR

EXT

INIT

OM (OFLAG)

Write

Reset

000

TMRA0_CTRL (Timer A, Channel 0 Control)—Address: TMRA_BASE + $6

TMRA1_CTRL (Timer A, Channel 1 Control)—Address: TMRA_BASE + $E

TMRA2_CTRL (Timer A, Channel 2 Control)—Address: TMRA_BASE + $16

TMRA3_CTRL (Timer A, Channel 3 Control)—Address: TMRA_BASE + $1E

TMR Control Register (CTL) continued

Bits

Name

Description

8 - 7

SCS

Secondary Source

This bit field provides additional information used for counting, such as direction.

Counter 0 input pin (TIO0)

Counter 1 input pin (TIO1)

Counter 2 input pin (TIO2)

Counter 3 input pin (TIO3)

ONCE

Count Once

This bit selects continuous or one-shot counting mode.

Count repeatedly

Count until compare, then stop. Counting up: compares when counter reaches CMP1

value. Counting down: compares when counter reaches CMP2 value.

LENGTH

Count Length

Determines whether counter counts to the compare value, reinitializing itself.

Roll-over

Count until compare, then reinitialize

See the following page for continuation of this register

DSP56857 Datasheet(PDF) 593 Page - Freescale Semiconductor, Inc

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