C167CS datasheet(254/517 Pages) INFINEON

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C167CS

Derivatives

The General Purpose Timer Units

User’s Manual

10-26

V2.0, 2000-07

Timer 6 Output Toggle Latch

An overflow or underflow of timer T6 will clock the toggle bit T6OTL in control register

T6CON. T6OTL can also be set or reset by software. Bit T6OE (Alternate Output

Function Enable) in register T6CON enables the state of T6OTL to be an alternate

function of the external output pin T6OUT. For that purpose, a ‘1’ must be written into the

respective port data latch and pin T6OUT must be configured as output by setting the

respective direction control bit to ‘1’. If T6OE = ‘1’, pin T6OUT then outputs the state of

T6OTL. If T6OE = ‘0’ pin T6OUT can be used as general purpose IO pin.

In addition, T6OTL can be used in conjunction with the timer over/underflows as an input

for the counter function of the auxiliary timer T5. For this purpose, the state of T6OTL

does not have to be available at pin T6OUT, because an internal connection is provided

for this option.

An overflow or underflow of timer T6 can also be used to clock the timers in the

CAPCOM units. For this purpose, there is a direct internal connection between timer T6

and the CAPCOM timers.

Timer 6 in Timer Mode

Timer mode for the core timer T6 is selected by setting bitfield T6M in register T6CON

to ‘000B’. In this mode, T6 is clocked with the internal system clock divided by a

programmable prescaler, which is selected by bit field T6I. The input frequency

fT6 for

timer T6 and its resolution

rT6 are scaled linearly with lower clock frequencies fCPU, as

can be seen from the following formula:

Figure 10-17 Block Diagram of Core Timer T6 in Timer Mode

fT6 =

fCPU

× 2<T6I>

rT6 [µs] =

fCPU [MHz]

× 2<T6I>

Core Timer Tx

TxOTL

Interrupt

Request

TxOE

TxOUT

TxR

2n : 1

Txl

EXOR

MUX

TxEUD

TxUDE

MCB02028

TxUD

CPU

Up/

Down

T6EUD = P5.10

x = 6

T6OUT = P3.1

n = 2 … 9

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