ST90135 datasheet(113/190 Pages) STMICROELECTRONICS

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ST90158 - MULTIFUNCTION TIMER (MFT)

MULTIFUNCTION TIMER (Cont’d)

For a configuration where TxOUTA is driven by the

Over/Underflow and by Compare 0, and TxOUTB

is driven by the Over/Underflow and by Compare

1. OACR is programmed with TxOUTA preset to

“0”. OUF sets TxOUTA while CM0 resets it, and

CM1 has no effect. OBCR is programmed with Tx-

OUTB preset to “1”. OUF toggles TxOUTB, CM1

sets it and CM0 has no effect.

For a configuration where TxOUTA is driven by the

Over/Underflow and by Compare 0, and TxOUTB

is driven by Compare 0 and 1. OACR is pro-

grammed with TxOUTA preset to “0”. OUF sets

TxOUTA, CM0 resets it and CM1 has no effect.

OBCR is programmed with TxOUTB preset to “0”.

OUF has no effect, CM0 sets TxOUTB and CM1

toggles it.

Output Waveform Samples In Biload Mode

TxOUTA is programmed to monitor the two time

intervals, t1 and t2, of the Biload Mode, while Tx-

OUTB is independent of the Over/Underflow and

is driven by the different values of Compare 0 and

Compare 1. OACR is programmed with TxOUTA

preset to “0”. OUF toggles the output and CM0 and

CM1 do not affect TxOUTA. OBCR is programmed

with TxOUTB preset to “0”. OUF has no effect,

while CM1 resets TxOUTB and CM0 sets it.

Depending on the CM1/CM0 values, three differ-

ent sample waveforms have been drawn based on

the above mentioned configuration of OBCR. In

the last case, with a different programmed value of

OBCR, only Compare 0 drives TxOUTB, toggling

the output.

Note (*) Depending on the CMP1R/CMP0R values

OACR = [101100X0]

OBCR = [000111X0]

T0OUTA

T0OUTB

OUF

COMP0

COMP1

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