AFD4400 datasheet(44/101 Pages) NXP

44 / 101 page

AFD4400 Digital Front End Processor Data Sheet, Rev. 0

Electrical characteristics

Freescale Semiconductor

3.2

Power sequencing

The following figure depicts the power-up sequencing requirements.There is no timing parameters associated with it; board

designers need to ensure the sequence.

Figure 4. Power-up sequencing

3.2.1

Power-on ramp rate

This section describes the AC electrical specifications for the power-on ramp rate requirements. Controlling the maximum

power-on ramp rate is required to avoid falsely triggering the ESD circuitry. Table 19 provides the power supply ramp rate

specifications.

Table 19. Power supply ramp rate

Parameter

Min

Max

Unit

Note

Required ramp rate for all voltage supplies

—

V/mS

3,4

Required ramp rate for P1OVDD and P2OVDD

—

V/mS

1, 2,3,4

Note:

1. P1OVDD should be tied to ground during functional applications.This supply is needed in the factory for programming

of memory repair fuses.

2. P2OVDD should be tied to ground during functional applications. It can be driven to the specified supply during

functional fuse programming.

3. Ramp rate is specified as a linear ramp from 10 to 90%. If non-linear (for example, exponential), the maximum rate of

change from 200 to 500 mV is the most critical as this range might falsely trigger the ESD circuitry.

4. Over full recommended operating temperature range (see Table 3).

RSTIN_B

VDD

TRST_B

P1OVDD/P2OVDD

Note :

1. The Core VDD should come first. Other supplies can be in any order once the core supply is up and stable.

2. RSTIN_B and TRST_B should remain asserted till the power supplies get stable.

3. Refer to DC operating condition for supply specification.

FVDD/JVDD/GVDD1-9/MVDD/TVDD/

MVDD1_8/TVDD1_8/LVDD1-3/

SD1-3_XPA_DVDD

4. During power off VDD should be the last supply to get turned off.

AFD4400 Datasheet(PDF) 44 Page - NXP Semiconductors

AFD4400 Datasheet(HTML) 44 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL