Chapter 2: Device Datasheet for Arria V Devices
2–41
Configuration Specification
FPP Configuration Timing when DCLK to DATA[] > 1
Figure 2–6 shows the timing waveform for a FPP configuration when using a MAX II
device or microprocessor as an external host. This waveform shows timing when the
DCLK-to-DATA[]ratio is more than 1.
(1), (2)
Figure 2–6. FPP Configuration Timing Waveform When the DCLK-to-DATA[] Ratio is >1
tCF2ST1
tCFG
tCF2CK
nCONFIG
nSTATUS (3)
tSTATUS
tCF2ST0
CONF_DONE (4)
t
CL
tCF2CD
(8)
tST2CK
t
CH
DCLK (6)
DATA[15..0] (8)
User I/O
(7)
(5)
1
2
1
1
2
r
1
2
r
r
t
CLK
n
Word 0
Word 1
Word (n-1) Word
User Mode
User Mode
Word 3
t
t
tDSU
DH
DH
High-Z
(9)
INIT_DONE
tCD2UM
Notes to Figure 2–6:
(1) To find the DCLK-to-DATA[]ratio for your system, refer Table 2–38 on page 2–38.
(2) The beginning of this waveform shows the device in user mode. In user mode, nCONFIG, nSTATUS, and CONF_DONEare at logic high levels.
When nCONFIGis pulled low, a reconfiguration cycle begins.
(3) After power up, the Arria V device holds nSTATUSlow for the time as specified by the POR delay.
(4) After power up, before and during configuration, CONF_DONEis low.
(5) Do not leave DCLKfloating after configuration. You can drive it high or low, whichever is more convenient.
(6) “r” denotes the DCLK-to-DATA[]ratio. For the DCLK-to-DATA[]ratio based on the decompression and the design security feature enable
settings, refer to Table 2–38 on page 2–38.
(7) If needed, pause DCLKby holding it low. When DCLKrestarts, the external host must provide data on the DATA[15..0]pins prior to sending
the first DCLKrising edge.
(8) To ensure a successful configuration, send the entire configuration data to the Arria V device. CONF_DONEis released high after the Arria V device
receives all the configuration data successfully. After CONF_DONEgoes high, send two additional falling edges on DCLKto begin initialization
and enter user mode.
(9) After the option bit to enable the INIT_DONEpin is configured into the device, the INIT_DONEgoes low.
February 2012 Altera Corporation
Arria V Device Handbook
Volume 1: Device Overview and Datasheet
ALTERA [ ALTERA CORPORATION ]
