Generating A1, Bhe# And Ble# For Addressing 16-Bit Devices - Intel Quark SoC X1000 Core Developer's Manual

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Bus Operation—Intel Quark Core
Table 64.

Generating A1, BHE# and BLE# for Addressing 16-Bit Devices

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Intel
BE3#
1†
1
1
1
1
1†
1
1
0
0†
0†
0†
0
0†
0
0
Notes:
1. BLE# asserted when D[7:0] of 16-bit bus is asserted.
2. BHE# asserted when D[15:8] of 16-bit bus is asserted.
3. A1 low for all even words; A1 high for all odd words.
KEY:
x = don't care
† = non-occurring pattern of byte enables; either none are asserted or the pattern has byte enables
asserted for non-contiguous bytes
October 2013
Order Number: 329679-001US
Quark SoC X1000 Core
BE2# BE1# BE0#
1† 1† 1†
1 1 0
1 0 1
1 0 0
0 1 1
0† 1† 0†
0 0 1
0 0 0
1 1 1
1† 1† 0†
1† 0† 1†
1† 0† 0†
1 1
0† 1† 0†
0 0 1
0 0 0
8-, 16-Bit Bus Signals
3 2
A1 BHE# BLE# (A0)
x x x
0 1 0
0 0 1
0 0 0
1 1 0
x x x
0 0 1
0 0 0
1 0 1
x x x
x x x
x x x
1 0 0
x x x
0 0 1
0 0 0
Comments
1
x–no asserted bytes
x–not contiguous bytes
x–not contiguous bytes
x–not contiguous bytes
x–not contiguous bytes
x–not contiguous bytes
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Intel Quark SoC X1000 Core
Developer's Manual
189