Issue 10005442, Volume 2, Chapter 14 "Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet", Version 3.1
EPCS128 configuration devices are not available in an 8-pin SOIC package. EPCS128 devices are only available in a 16-pin SOIC package. Also EPCS128 configuration devices are only available in a lead free package designated by the suffix "N".
The ordering code is EPCS128SI16N.
Issue 1-5MU959, Chapter 13 "Configuring Cyclone FPGAs", Version 1.5
In active serial (AS) mode, version 1.5 stated Cyclone FPGAs drive out control signals on the falling edge of DCLK and latch configuration data on the rising edge of DCLK. This is incorrect, Cyclone FPGAs drive out control signals and latch configuration data on the falling edge of DCLK.