AT89C51CC02CA-RATUM datasheet(56/159 Pages) ATMEL

tên linh kiện	AT89C51CC02CA-RATUM

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AT/T89C51CC02

4126L–CAN–01/08

Table 37. PCON Register

PCON (S:87h)

Power Control Register

Reset Value = 00X1 0000b

Not bit addressable

7654

3210

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

Clear to select SM0 bit in SCON register.

Set to select FE bit in SCON register.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

4POF

Power-off Flag

Clear to recognize next reset type.

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

software.

3GF1

General purpose Flag

Cleared by user for general purpose usage.

Set by user for general purpose usage.

2GF0

General purpose Flag

Cleared by user for general purpose usage.

Set by user for general purpose usage.

1PD

Power-down Mode bit

Cleared by hardware when reset occurs.

Set to enter power-down mode.

0IDL

Idle Mode bit

Clear by hardware when interrupt or reset occurs.

Set to enter idle mode.

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