Rainbow-electronics AT89C5122 Manual de usuario descargar pdf (Pagina 185)

185

AT8xC5122/23

4202E–SCR–06/06

Registers

Reset Value = 00X1 0000b

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.

Table 113. Power Control Register - PCON (S:87h)

76543210

SMOD1 SMOD0 - POF GF1 GF0 PD IDL

Bit

Number

Bit

Mnemonic Description

7SMOD1

Serial port Mode bit 1 for UART

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

6SMOD0

Serial port Mode bit 0 for UART

Cleared 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 change this bit.

4POF

Power-Off Flag (Only for ROM version parts)

Cleared to recognize next reset type

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

by software

Warning : in CRAM and FLASH versions, this bit is reserved.

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

Cleared by hardware when interrupt or reset occurs

Set to enter idle mode

1 2 ... 180 181 182 183 184 185 186 187 188 189 190 ... 212 213

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