TMP93CS41 datasheet(168/248 Pages) TOSHIBA

168 / 248 page

TMP93CS40/TMP93CS41

2004-02-10

93CS40-166

When using a trigger signal from timer 4, set either T4FFCR<EQ5T4> or

T4MOD<EQ5T5> to “1”; a trigger is generated when the value in UC4 and the value in

TREG5 match. When using a trigger signal from timer 5, set T5FFCR<EQ7T6> to “1”; a

trigger is generated when the value in UC5 and the value in TREG7 match.

(4) Application of PG and timer output

As explained in the previous section trigger signal from timer, the timings for shifting PG

and inverting TFF differ depending on the timer mode. An application which operates PG

while operating an 8-bit timer in PPG mode is explained below.

To drive a stepping motor, a synchronizing signal is required for the excitation timing, in

addition to the value of each phase (PG output). In this application, port 6 is used as a

stepping motor control port to output a synchronizing signal to the TO1 pin (shared with

P71).

Figure 3.10.14 Output Waveforms for 4-Phase 1-step Excitation

Setting example:

TRUN

← − X − − − − 0 0

Stop timer 0, and clear it to zero.

TMOD

← 1 0 X X X X 0 1

Set timer 0 and timer 1 to PPG output mode and select

φT1 as the input clock.

TFFCR

← X X X 0 0 1 1 X

Enable TFF1 inversion and set TFF1 to “1”.

TREG0

← *

Set the duty of TO1 to TREG0.

TREG1

← *

Set the cycle of TO1 to TREG1.

P7CR

← X X X X − − 1 −

P7FC

← X X X X − − 1X

Assign P71 as TO1.

P6CR

← − − − − 11 1 1

P6FC

← − − − − 11 1 1

Assign P60 to P63 as PG0.

PG01CR

← − − − − 0 0 0 1

Set PG0 to 4-phase 1-step excitation mode.

PG0REG

← *

Set an initial value.

TRUN

← 1 X − − − − 1 1

Start timer 0 and timer 1.

X: Don’t care,

−: No change

TO1 (P71)

TREG1

PG00 (P60)

TREG0

PG01 (P61)

PG02 (P62)

PG03 (P63)

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