EP1C12F256I7N Datasheet, PDF (357/385 Pages) List of Unclassifed Manufacturers – Cyclone Device Handbook, Volume 1

Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
Figure 14–6. Write Disable Operation Timing Diagram
nCS
DCLK
ASDI
01234567
Operation Code
DATA
High Impedance
Read Status Operation
The read status operation code is b'0000 0101, with the MSB listed first.
You can use the read status operation to read the status register.
Figures 14–7 and 14–8 show the status bits in the status register of both
serial configuration devices.
Figure 14–7. EPCS4, EPCS16, EPCS64, and EPCS128 Status Register Status
Bits
Bit 7
Bit 0
BP2 BP1 BP0 WEL WIP
Block Protect Bits [2..0]
Write In
Progress Bit
Write Enable
Latch Bit
Figure 14–8. EPCS1 Status Register Status Bits
Bit 7
Bit 0
BP1 BP0 WEL WIP
Block Protect
Bits [1..0]
Write In
Progress Bit
Write Enable
Latch Bit
Altera Corporation
May 2008
14–23
Cyclone Handbook, Volume 1