PI7C9X110 Pericom Semiconductor Corporation, PI7C9X110 Datasheet - Page 49

• Manufacturer Part Number: PI7C9X110
• Description: Pcie-to-pci Reversible Bridge
• Manufacturer: Pericom Semiconductor Corporation

7.4.39 UPSTREAM MEMORY WRITE FRAGMENT CONTROL REGISTER – OFFSET 68h
7.4.40 RESERVED REGISTER – OFFSET 6Ch
7.4.41 EEPROM AUTOLOAD CONTROL/STATUS REGISTER – OFFSET 70h
Pericom Semiconductor
BIT
15:14
29:16
BIT
31:30
BIT
0
1
2
3
5:4
6
7
FUNCTION
Receiver Termination
Control
Reserved
FUNCTION
Memory Write Fragment
Control
FUNCTION
Initiate EEPROM Read or
Write Cycle
Control Command for
EEPROM
EEPROM Error
EPROM Autoload Complete
Status
EEPROM Clock Frequency
Control
EEPROM Autoload Control
Fast EEPROM Autoload
Control
TYPE
TYPE
TYPE
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
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DESCRIPTION
00: 52 ohms
01: 57 ohms
10: 43 ohms
11: 46 ohms
Reset to 00
Reset to 00h
DESCRIPTION
Upstream Memory Write Fragment Control
00: Fragment at 32-byte boundary
01: Fragment at 64-byte boundary
1x: Fragement at 128-byte boundary
Reset to 10h
DESCRIPTION
This bit will be reset to 0 after the EEPROM operation is finished.
0: EEPROM AUTOLOAD disabled
0 -> 1: Starts the EEPROM Read or Write cycle
Reset to 0
0: Read
1: Write
Reset to 0
0: EEPROM acknowledge is always received during the EEPROM cycle
1: EEPROM acknowledge is not received during EEPROM cycle
Reset to 0
0: EEPROM autoload is not successfully completed
1: EEPROM autoload is successfully completed
Reset to 0
Where PCLK is 125MHz
00: PCLK / 4096
01: PCLK / 2048
10: PCLK / 1024
11: PCLK / 128
Reset to 00
0: Enable EEPROM autoload
1: Disable EEPROM autoload
Reset to 0
0: Normal speed of EEPROM autoload
1: Increase EEPROM autoload by 32x
Reset to 0
May 2008, Revision 2.6
PCIe-to-PCI Reversible Bridge
PI7C9X110