CAUTION:
To ensure minimum current consumption during power up, and to avoid functionality issue, follow the power-up sequence shown in the following figure. This power-up sequence is required for all Arria® V GX and GT devices, except Arria® V GX A5 and A7, and Arria® V GT C7 devices. However, to ensure minimum current consumption during power up, Altera recommends that you also follow the power-up sequence for the Arria® V GX A5 and A7, and Arria® VGT C7 devices.
Note: If you plan to migrate your design from Arria® V GX A5 and A7, and Arria® V GT C7 devices to other Arria® V devices, your design must adhere to the power-up sequence required for the other Arria® V devices.
Figure 227. Power-Up Sequence Requirement for Arria® V GX and GT DevicesPower up VCCBAT at any time. Ramp up the power rails in each group to a minimum of 80% of their full rail before the next group starts. Power up VCCP , VCCR_GXB , VCCT_GXB , and VCCL_GXB together with VCC .
Figure 228. Power-Up Sequence Recommendation for Arria® V SX and ST Devices Power up the Vccbat at any time. Ramp up the power rails in each group to a minimum of 80% of their recommended operating range before the next group starts.
Table 121 lists the current transient that you may observe at the indicated power rails after powering up the Arria® V device, and before configuration starts. These transients have a finite duration bounded by the time at which the device enters configuration mode. For Arria® V SX and ST devices, you may observe the current transient in Table 121 after powering up the device, and before all the power supplies reach the recommended operating range.
Table 121. Maximum Power Supply Current Transient and Typical Duration
Power Rail |
Maximum Power Supply Current Transient (mA) |
Typical Duration (µs) 46 |
VCCPD 47, 48 |
1250 |
50 |
VCCIO 48, 49 |
350 |
200 |
VCC_AUX 50 |
450 |
10 |
VCC 50 |
700 |
100 |
VCCPD_HPS 51, 52, 53 |
400 |
50 |
VCCIO_HPS 51, 54, 53 |
100 |
200 |
VCC_HPS 50, 51 |
420 |
100 |
For details about the minimum current requirements, refer to the Early Power Estimator (EPE), and compare to the information listed in Table 121. If the current transient exceeds the minimum current requirements in the EPE, you need to take the information into consideration for your power regulator design.
47 You may observe the current transient at V
CCPD only when you do not follow the recommended power-up sequence. To avoid the current transient at V
CCPD, follow the recommended power-up sequence.
49 You may observe the current transient at V
CCIO if you power up V
CCIO before V
CCPD. To avoid the current transient at V
CCIO, follow the recommended power-up sequence by powering up V
CCIO and V
CCPD together.
52 You may observe the current transient at
VCCPD_HPS only when you do not follow the recommended power-up sequence. To avoid the current transient at
VCCPD_HPS , follow the recommended power-up sequence.
54 You may observe the current transient at V
CCIO_HPS if you power up V
CCIO_HPS before V
CCPD_HPS. To avoid the current transient at V
CCIO_HPS, follow the recommended power-up sequence by powering up V
CCIO_HPS and V
CCPD_HPS together.