ZHCSQ84D october 2022 – july 2023 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
PRODUCTION DATA
AM263x attempts to simplify the power reset requirements from previous Sitara MCU devices. There is no sequencing requirement with respect to the primary core digital VDD 1.2-V and I/O power 3.3-V rails. A pair of on-die LDO are supplied through the VDDS33 power net. These on-die LDO generate the required VDDS1V8 and VDDA1V8 1.8-V digital and analog power. The AM263x does require the minimum ramp time be respected for 3.3-V power-on. Additional PORz and SOP boot mode latch timing must be respected by the EVM design as well. Figure 7-1 describes the device power-on sequencing.
PARAMETER | MIN | MAX | UNIT | |
---|---|---|---|---|
tStartup | Time for 1.2-V and 3.3-V DC-DC converters to startup after being enabled. This is an arbitrary amount of time - no constraint imposed by the device. | – | – | ms |
tPGood | Time for Power Good signals to be generated from DC-DC converters after rails are stable. This is an arbitrary amount of time - no constraint imposed by the device. | – | – | ms |
tRamp_3V3 | Ramp time of the VDDS3V3 and VDDA3V3 supplies. This is a requirement imposed by the device. | 0.1 | – | ms |
tSOP_Sampled | Time from PORz de-assertion until the SOP[3:0] pins are sampled. This is a device internal pentameter. Sampling happens when the internally generated supplies are stable. For information only. Refer to TSU_SOP and TH_SOP parameters for application usage. | 0 | – | ms |
tSU_SOP | Setup time for SOP relative to PORz assertion. | 10 | – | μs |
tH_SOP | Hold time for SOP relative to WARMRSTn deassertion. | 0 | – | μs |
tWARMRSTn | Time from PORz de-assertion until the device de-asserts the WARMRESETn signal. | 2.0 | – | ms |