PM7375-SC datasheet(47/430 Pages) PMC

47 / 430 page

PM7375 LASAR-155

DATA SHEET

PMC-931127

ISSUE 6

LOCAL ATM SAR & PHYSICAL LAYER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

8.4

Microprocessor Interface Signals (31)

Name

Type

No.

Feature

MPENB

Input

153

The active low microprocessor port enable (MPENB)

signal is used to configure the Microprocessor

Interface Port for master or slave mode operation. If

MPENB is low, the port is configured for slave mode

operation and an external microprocessor is permitted

to access LASAR-155 registers using signals, CSB,

RDB, WRB, D[15:0] and A[8:0]. Please refer to the

Normal Mode Register Description Section for register

details.

If MPENB is high, LASAR-155 register accesses using

the Microprocessor Interface Port is disabled. The

Microprocessor Interface Port is configured as a

master and the PCI Host has control of all internal

LASAR-155 registers and the LASAR-155 Local Bus.

CSB/CS1B

I/O

161

For slave mode operation the active low chip select

(CSB) signal is configured as an input. CSB is low

during LASAR-155 Microprocessor Interface Port

Microprocessor Interface Port register accesses are

controlled using only the RDB and the WRB signals,

CSB should be connected to an inverted version of

RSTB.

For master mode operation the active low chip select

one (CS1B) signal is configured as an output. CS1B is

set low during LASAR-155 Local Bus accesses to the

External Devices address space as defined using the

External Device Memory Base Address register. For

this mode of operation CS1B is generated on the rising

edge of PCICLK.

PM7375-SC Datasheet(PDF) 47 Page - PMC-Sierra, Inc

PM7375-SC Datasheet(HTML) 47 Page - PMC-Sierra, Inc

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