Intel 8XC196Lx Manual de usuario descargar pdf (Pagina 47)

5-3

I/O PORTS

Figure 5-1. Ports 1, 2, 5, and 6 Internal Structure (87C196LA, LB Only)

5.2.1 Configuring Ports 1, 2, 5, and 6 (Bidirectional Ports)

Using the port mode register, you can individually configure each pin for port 1, 2, 5, and 6 to

operate either as a general-purpose I/O signal (I/O mode) or as a special-function signal (special-

function mode). In either mode, three configurations are possible: complementary output, high-

_MODE

_DRV

SFDIR

_REG

Sample

Latch

PH1 Clock

Internal Bus

SFDATA

Any Write to P

_MODE

Weak

Pullup

RESET#

Buffer

Read Port

300ns Delay

I/O Pin

RESET#

A5265-01

150Ω to 200Ω

Medium

Pullup

RESET#

_PIN

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 135 136

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Intel 8XC196Lx Manual de usuario Pagina 47