Specifications

Feature Port Register Description

Data Port xxxxxxxxx0b

This port is used to write or read the data of the register set by the index port. The

address of the register and description of bits are found in the following table.

Index Port xxxxxxxxx1b

The index port is used to address the corresponding data register through which

the data port is to be accessed.

MISCSET Register 0

Index: 0 Data Port Description

MISCSET 0 ID3 ID2 ID1 ID0 VPPEN RES WDEN RES

PWR 0 0 0 1 1 x 0 x

r r r r r/w x r/w x

D7 D6 D5 D4 D3 D2 D1 D0

5.6.2

Bit Name Function

7-4 ID3-ID0 Identification code 4h in High-Nibble for AIO486

3 VPPEN Activate programming voltage (12 Volt)

This bit also removes the write protection for all

Flash and SRAM modules.

0 = Programming voltage on

1 = Programming voltage off

(reserved)

2 RES Enable watchdog timer

1 WDEN 0 = Watchdog off

1 = Watchdog on

(reserved)

0 RES