Instruction Manual

ATAR862-4

4552B–4BMCU–02/03

Figure 49. DCG Output Signals

Timer 2 Mode Register 2

(T2M2)

Address: "7"hex - Subaddress: "2"hex

If one of these output modes is used the T2O alternate function of Port 4 must also be

activated.

DCGIN

DCGO0

DCGO1

DCGO2

DCGO3

Bit 3Bit 2Bit 1Bit 0

T2TOP T2OS2 T2OS1 T2OS0 Reset value: 1111b

T2TOP Timer 2 Toggle Output Preset

This bit allows the programmer to preset the Timer 2 output T2O.

T2TOP = 0, resets the toggle outputs with the write cycle (M2 = 0)

T2TOP = 1, sets toggle outputs with the write cycle (M2 = 1)

Note: If T2R = 1, no output preset is possible

T2OS2 Timer 2 Output Select bit 2

T2OS1 Timer 2 Output Select bit 1

T2OS0 Timer 2 Output Select bit 0

Output

Mode T2OS2 T2OS1 T2OS0 Clock Output (POUT)

1111Toggle mode: a Timer 2 compare match toggles

the output flip-flop (M2) -> T2O

2110Duty cycle burst generator 1: the DCG output

signal (DCG0) is given to the output and gated by

the output flip-flop (M2)

3101Duty cycle burst generator 2: the DCG output

signal (DCGO) is given to the output and gated by

the SSI internal data output (SO)

4100Biphase modulator: Timer 2 modulates the SSI

internal data output (SO) to Biphase code

5011Manchester modulator: Timer 2 modulates the SSI

internal data output (SO) to Manchester code

6010SSI output: T2O is used directly as SSI internal

data output (SO)

7001PWM mode: an 8/12-bit PWM mode

8000Not allowed