EP1S80F1020C6 Datasheet, PDF (753/864 Pages) Altera Corporation – Stratix Device Handbook, Volume 1

Configuring Stratix & Stratix GX Devices
Figure 11–19 shows the Stratix and Stratix GX timing waveforms when
using strobed nRS and nWS signals.
Figure 11–19. PPA Timing Waveforms Using Strobed nRS & nWS Signals
t_CFG
nCONFIG
t_CF2ST1
nSTATUS
t_CF2SCD
CONF_DONE
nCS (1)
CS (1)
DATA[7..0]
nWS
nRS
INIT_DONE
User I/O
DATA7/RDYnBSY (4)
t_CF2ST0
t_STATUS
t_CSH
t_CSSU
t_DH
Byte 0 Byte 1
t_DSU
Byte n
t_WSP
t_WS2RS
t_CF2WS
t_RSD7
t_RDY2WS
t_RS2WS
t_WS2RS
t_WS2B
t_BUSY
(2)
(2)
(3)
(2)
(2)
(2)
(2)
t_CD2UM
Notes to Figure 11–19:
(1) The user can toggle nCS or CS during configuration if the design meets the specification for t_CSSU, t_WSP, and t_CSH.
(2) Device I/O pins are in user mode.
(3) The DATA[7..0] pins are available as user I/Os after configuration and the state of theses pins depends on the
dual-purpose pin settings. Do not leave DATA[7..0] floating. If these pins are not used in user-mode, you should
drive them high or low, whichever is more convenient.
(4) DATA7 is a bidirectional pin. It represents an input for data input, but represents an output to show the status of
RDYnBSY.
Altera Corporation
July 2005
11–35
Stratix Device Handbook, Volume 2