AT87C51RB2_14 datasheet(39/86 Pages) ATMEL

Part #	AT87C51RB2

Description	Programmable Clock Out and Up/Down Timer/Counter 2

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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39 / 86 page

39

4188F–8051–01/08

AT/TS8xC51Rx2

Reset Value = 00X1 0000b

Not bit addressable

Power-off flag reset value will be 1 only after a power on (cold reset). A warm reset doesn’t affect

the value of this bit.

Bit

Number

Bit

Mnemonic

Description

7

SMOD1

Serial port Mode bit 1

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

6

SMOD0

Serial port Mode bit 0

Clear to select SM0 bit in SCON register.

Set to to select FE bit in SCON register.

5

-

Reserved

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

4

POF

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.

3

GF1

General purpose Flag

Cleared by user for general purpose usage.

Set by user for general purpose usage.

2

GF0

General purpose Flag

Cleared by user for general purpose usage.

Set by user for general purpose usage.

1

PD

Power-Down mode bit

Cleared by hardware when reset occurs.

Set to enter power-down mode.

0

IDL

Idle mode bit

Clear by hardware when interrupt or reset occurs.

Set to enter idle mode.

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AT87C51RB2 Datasheet(PDF) 39 Page - ATMEL Corporation

AT87C51RB2 Datasheet(HTML) 39 Page - ATMEL Corporation

Similar Part No. - AT87C51RB2_14

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