Siemens EF 88H Series Manuel d'utilisateur télécharger pdf (Page 48)

Semiconductor Group 5 - 13

On-Chip Peripheral Components

Extended Prescaler for Timer 2

The prescaler for Timer 2 has an extended range. This prescaler divides the input clock for Timer 2

when it is operated in timer mode. In addition to the ÷ 2 option there are now scale ratings of ÷ 4

and ÷ 8 available. The rate is selected by the control bits T2PS (T2CON.7) and T2PS1 (CTCON.7).

Table 5-5 lists all available options. This prescaler must not be used when Timer 2 is operated in

counter mode.

Table 5-5, Timer 2 Prescaler

T2PS1 (CTCON.7) T2PS (T2CON.7) Prescaler Ratio

00÷ 1

01÷ 2

10÷ 4

11÷ 8

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 136 137

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Siemens EF 88H Series Manuel d'utilisateur Page 48