T89C51AC2-RLSI-M datasheet(56/117 Pages) ATMEL

56 / 117 page

Draft.A - March 30, 2001

Preview - Confidential

T89C51AC2

PCON (S:87h)

Power Control Register

Reset Value = 00X1 0000b

Not bit addressable

Figure 41. PCON Register

SMOD1

SMOD0

POF

GF1

GF0

IDL

Bit Number Bit Mnemonic

Description

SMOD1

Serial port Mode bit 1

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

SMOD0

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.

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.

GF1

General purpose Flag

Cleared by user for general purpose usage.

Set by user for general purpose usage.

GF0

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.

IDL

Idle mode bit

Clear by hardware when interrupt or reset occurs.

Set to enter idle mode.

T89C51AC2-RLSI-M 数据表(PDF) 56 Page - ATMEL Corporation

T89C51AC2-RLSI-M 数据表(HTML) 56 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载