Rainbow-electronics T89C51CC01 Manual de usuario descargar pdf (Pagina 52)

T89C51CC01

Rev. D – 17-Dec-01

Table 19. PCON Register

PCON (S:87h)

Power Control Register

Reset Value = 00X1 0000b

Not bit addressable

76543210

SMOD1 SMOD0 - POF GF1 GF0 PD IDL

Bit

Number

Bit

Mnemonic Description

7SMOD1

Serial port Mode bit 1

Settoselectdoublebaudrateinmode1,2or3.

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.

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 148 149

T89C51CC01 1

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Rainbow-electronics T89C51CC01 Manual de usuario Pagina 52

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