PM7375-SC datasheet(49/430 Pages) PMC

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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

D[0]

D[1]

D[2]

D[3]

D[4]

D[5]

D[6]

D[7]

D[8]

D[9]/A[9]

D[10]/A[10]

D[11]/A[11]

D[12]/A[12]

D[13]/A[13]

D[14]/A[14]

D[15]/A[15]

I/O

164

167

168

169

170

171

172

173

174

188

189

190

191

192

193

194

For slave mode operation the bi-directional data bus

D[15:0] is used during LASAR-155 Microprocessor

Interface Port register read and write accesses.

Little-endian byte formatting is used. D[15:8] should

contain the most significant byte of a word while D[7:0]

should contain the least significant byte of a word.

For master mode operation, only D[7:0] is used for

LASAR-155 Local Bus accesses data transfers.

A[15:9] are configured as outputs and supply the most

significant seven bits of the address on the LASAR-155

Local Bus. For this mode of operation A[15:9] are

updated on the rising edge of PCICLK. Note, D[8] is

not used and should be pulled high.

A[0]

A[1]

A[2]

A[3]

A[4]

A[5]

A[6]

A[7]

A[8]

I/O

175

176

177

178

179

180

181

186

187

For slave mode operation the address bus A[8:0] is

configured as inputs. A[8:0] selects specific

Microprocessor Interface Port registers during

LASAR-155 register accesses. A[8] is the Test Register

Select (TRS) address pin. TRS selects between normal

and test mode register accesses. TRS is high during

test mode register accesses, and is low during normal

mode register accesses.

For master mode operation the A[8:0] bus is configured

as an output. A[8:0] supplies the least significant nine

bits of the address on the LASAR-155 Local Bus. For

this mode of operation A[8:0] are updated on the rising

edge of PCICLK.

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