JAJSFP6B July 2018 – October 2020 DLPC3434
PRODUCTION DATA
Although the DLPC3434 requires an array of power supply voltages, (for example, VDD, VDDLP12, VDD_PLM/D, VCC18, VCC_FLSH, VCC_INTF), since V is tied to the 1.1-V VDD supply, then there are no restrictions regarding the relative order of power supply sequencing to avoid damaging the DLPC3434 (this is true for both power-up and power-down scenarios). Similarly, there is no minimum time between powering-up or powering-down the different supplies if VDDLP12 is tied to the 1.1-V VDD supply.
Although there is no risk of damaging the DLPC3434 if the above power sequencing rules are followed, the following additional power sequencing recommendations must be considered to ensure proper system operation.
Note that when VDD core power is applied, but I/O power is not applied, additional leakage current may be drawn. This added leakage does not affect normal DLPC3434 operation or reliability.
Figure 9-1 and Figure 9-2 show the DLPC3434 power-up and power-down sequence for both the normal PARK and fast PARK operations of the DLPC3434 controller.
During a Normal Park it is recommended to maintain SYSPWR within specification for at least 50 ms after PROJ_ON goes low. This is to allow the DMD to be parked and the power supply rails to safely power down. After 50 ms, SYSPWR can be turned off. If a DLPA200x is used, it is also recommended that the 1.8-V supply fed into the DLPA200x load switch be maintained within specification for at least 50 ms after PROJ_ON goes low.
t1: | SYSPWR (VIN) applied to the PMIC. All other voltage rails are derived from SYSPWR. |
t2: | All supplies reach 95% of their specified nominal value. Note HOST_IRQ may go high sooner if it is pulled-up to a different external supply. |
t3: | Point where RESETZ is deasserted (goes high). This indicates the beginning of the controller auto-initialization routine. |
t4: | HOST_IRQ goes low to indicate initialization is complete. I2C is now ready to accept commands. |
(a): | The typical delay between the PLL reference clock becoming active and RESETZ being deasserted (going high) is less than 1 ms. PLL_REFCLK must be stable within 5 ms of all power being applied, and may be active before power is applied. |
(b): | There is a typical delay of 1.5 s between being FPGA RESETZ being deasserted and FPGA_RDY being asserted (going high). This duration is due to FPGA boot logic. |
(c): | There is a typical controller boot time of 100 ms. PARKZ must be high before RESETZ releases to support auto-initialization. RESETZ must also be held low for at least 5 ms after the power supplies are in specification. |
(d): | There is a typical FPGA setup time of 2.75 ms before the system completes boot process. During this period, the DLPC3434 controller writes startup values to the FPGA registers. |
(e): | After FPGA setup is complete, I2C now accepts commands. |
t1: | PROJ_ON goes low to begin the power down sequence. |
t2: | The controller finishes parking the DMD. |
t3: | RESETZ is asserted which causes HOST_IRQ to be pulled high. |
t4: | All controller power supplies are turned off. |
t5: | SYSPWR is removed now that all other supplies are turned off. |
(a): | I2C activity must stop before PROJ_ON is deasserted (goes low). |
(b): | The DMD will be parked within 20 ms of PROJ_ON being deasserted (going low). VDD, VDD_PLLM/D, VCC18, VCC_INITF, and VCC_FLSH power supplies and the PLL_REFCLK must be held within specification for a minimum of 20 ms after PROJ_ON is deasserted (goes low). However, 20 ms does not satisfy the typical shutdown timing of the entire chipset. It is therefore recommended to follow note (c). |
(c): | It is recommended that SYSPWR not be turned off for 50 ms after PROJ_ON is deasserted (goes low). This time allows the DMD to be parked, the controller to turn off, and the PMIC supplies to shut down. |
t1: | A fault is detected (in this example the PMIC detects a UVLO condition) and PARKZ is asserted (goes low) to tell the controller to initiate a fast park of the DMD. |
t2: | The controller finishes the fast park procedure. |
t3: | RESETZ is asserted which puts the controller in a reset state which causes HOST_IRQ to be pulled high. |
t4: | Eventually all power supplies that were derived from SYSPWR collapse. |
(a): | VDD, VDD_PLLM/D, VCC18, VCC_INITF, and VCC_FLSH power supplies and the PLL_REFCLK must be held within specification for a minimum of 32 µs after PARKZ is asserted (goes low). |
(b): | VCC18 must remain in specification long enough to satisfy DMD power sequencing requirements defined in the DMD datasheet. Also see the DLPAxxxx datasheets for more information. |