AT89C5131A-RDTIM datasheet(155/186 Pages) ATMEL

155 / 186 page

155

AT89C5130A/31A-M

4337G–USB–11/06

Registers

Table 108.

PCON Register

PCON (S:87h)

Power Control Register

Reset Value = 10h

765

43210

SMOD1

SMOD0

POF

GF1

GF0

IDL

Bit Number

Bit

Mnemonic Description

7SMOD1

Serial Port Mode bit 1

Set to select double baud rate in mode 1, 2 or 3.

6SMOD0

Serial Port Mode bit 0

Set to select FE bit in SCON register.

Clear to select SM0 bit in SCON register

Reserved

The value read from this bit is always 0. Do not set this bit.

4POF

Power-Off Flag

Set by hardware when VCC rises from 0 to its nominal voltage. Can also be set by

software.

Clear to recognize next reset type.

3GF1

General-purpose Flag 1

Set by software for general-purpose usage.

Cleared by software for general-purpose usage.

2GF0

General-purpose Flag 0

Set by software for general-purpose usage.

Cleared by software for general-purpose usage.

1PD

Power-down mode bit

Set this bit to enter in power-down mode.

Cleared by hardware when reset occurs.

0IDL

Idle mode bit

Set this bit to enter in Idle mode.

Cleared by hardware when interrupt or reset occurs.

AT89C5131A-RDTIM Datenblatt(PDF) 155 Page - ATMEL Corporation

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