TMP93CS32F datasheet(82/180 Pages) TOSHIBA

82 / 180 page

TMP93CS32

2004-02-10

93CS32-80

Example: When TREG3

= 04H and TREG2 = 80H

Figure 3.7.12 Timer Output by 16-Bit Timer Mode

(3) 8-bit PPG (Programmable Pulse Generation) output mode

Square wave pulse can be generated at any frequency and duty by timer 2. The output

pulse may be either low active or high active. In this mode, timer 3 cannot be used.

Timer 2 outputs pulse to TO3 pin (also used as P41).

Figure 3.7.13 8-Bit PPG Output Waveforms

In this mode, a programmable square wave is generated by inverting timer output each

time the 8-bit up counter (UC2) matches the timer registers TREG2 and TREG3.

However, it is required that the set value of TREG2 is smaller than that of TREG3.

Though the up counter (UC3) of timer 3 is not used in this mode, UC3 should be set for

counting by setting TRUN<T3RUN> to 1.

Figure 3.7.14 shows the block diagram for this mode.

Figure 3.7.14 Block Diagram of 8-Bit PPG Output Mode

Inversion

Value of up counter

(UC3, UC2)

Timer 2 comparator

match detect signal

Interrupt INTT3

0080H

0180H

0280H

0380H

0480H

0000H

Timer output TO3

TREG2

TREG3

TREG2 and UC2 match

(Interrupt INTT2)

TREG3 and UC2 match

(Interrupt INTT3)

TO3

Selector

8-bit

up counter

(UC2)

Comparator

φT1

φT4

φT16

T32MOD <T2CLK1:0>

TFF3

TREG2

TREG3

Selector

TRDC<TR2DE>

TREG2-WR

TRUN<T2RUN>

TO3

TFFCR

<TFF3C1:0, TFF3IE>

INTT2

INTT3

Shift trigger

Internal data bus

Inversion

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