MEC1632 datasheet(89/636 Pages) MICROCHIP

89 / 636 page

 2012-2018 Microchip Technology Inc.

DS00001592B-page 89

MEC1632

6.9

LPC Logical Device Configuration Registers

The configuration registers in the LPC Logical Device are described in Section 5.0, "Logical Device Configuration," on

page 63. These registers control the activity of all the Logical Devices in the MEC1632. The Activate Register controls

the LPC device itself. The Host can shut down the LPC Logical Device by clearing the Activate bit, but it cannot restart

the LPC interface, since once the LPC interface is inactive the Host has no access to any registers on the MEC1632.

The Embedded Controller can set or clear the Activate bit at any time.

ACTIVATE

When this bit is 1, the LPC Logical Device is powered and functional.

When this bit is 0, the logical device is powered down and inactive. Except for the Activate Register itself, clocks to the

block are gated and the LPC Logical Device will permit the ring oscillator to be shut down (see Section 6.10.4, "EC Clock

Control Register," on page 92). LPC bus output pads will be tri-stated. Serial IRQ activation is separately controlled by

the Device Mode register in the Chip-Level (Global) Control/Configuration Registers.

APPLICATION NOTE:

The Activate bit in the Activate Register should not be written ‘0’ to by the Host over LPC.

6.10

LPC Logical Device EC-only Registers

Table 6-7, "LPC EC-only Registers" summarizes the registers in the Host Interface block that are only accessible by the

EC. In addition to these registers, the Host Interface also contains Configuration registers, described in Section 5.0,

"Logical Device Configuration," on page 63.

Because their addresses are in the part of the LPC Logical Device address frame that is not addressable from the LPC

bus, the following registers are accessible only to the EC.

TABLE 6-6:

ACTIVATE REGISTER

HOST OFFSET

BYTE0: 30h

8-bit HOST SIZE

EC ADDRESS

FF_3330h

8-bit EC SIZE

POWER

VTR

00b nSYS_RST DEFAULT

BUS

LPC SPB

BYTE0 BIT

D6D5

D4D3D2

HOST TYPE

RRRRR

R/W

EC TYPE

RRRRR

R/W

BIT NAME

Reserved

Activate

TABLE 6-7:

LPC EC-ONLY REGISTERS

AHB Address

Name

VTR POR (

nSYS_RST) Default

FF_3100h

Reserved

0000_0000h

FF_3104h

LPC Bus Monitor Register

0000_0000h

FF_3108h

Host Bus Error Register

0000_0000h

FF_310Ch

EC SERIRQ Register

0000_0000h

FF_3110h

EC Clock Control Register

0000_0000h

FF_3120h

BAR Inhibit Register

0000_0000_0000_0000h

FF_3130h

BAR Init Register

0000_002Eh

FF_3140h

Mem BAR Inhibit Register

0000_0000_0000_0000h

MEC1632 Datasheet(PDF) 89 Page - Microchip Technology

MEC1632 Datasheet(HTML) 89 Page - Microchip Technology

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

Datasheet Download

Link URL