Rainbow-electronics T89C5121 Manual do Utilizador descarregar pdf (Página 11)

A/T8xC5121

4164G–SCR–07/06

Figure 6. Push-pull Output Configuration

LED Output Configuration The input only configuration is shown in Figure 7.

Figure 7. LED Source Current Configuration

Note: The port can be configured in quasi bi-directional mode and the level of current can be programmed by means of LEDCON0

and LEDCON1 registers before switching the led on by writing a logical 0 in Port latch.

Input

Strong

Port latch

Data

PMOS

NMOS

Port Latch

Data

Input

Data

LEDx.0

LEDx.1

Weak

2 CPU

CLOCK DELAY

PMOS

Strong

Medium

NMOS

LED1CTRL

LED2CTRL

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 114 115

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Rainbow-electronics T89C5121 Manual do Utilizador Página 11