During power-down, VCC and
VCCI must be supplied until after VCC2
is
discharged to within the specified limit of ground. Refer to Section 6.4.
Power supply slew rates during power-down
are flexible, provided that the transient voltage levels follow the requirements specified
in Section 6.1 and Section 6.4.
During power-down, LVCMOS input pins must
be less than specified in Section 6.4.
A. See Pin Configuration and
Functions for pin functions.
B. VCC must be up and stable
prior to VCC2 powering up.
C. PWRDNZ has two turn on options. Option 1:
PWRDNZ does not go high until VCC and VCC2 are up and stable, or
Option 2: PWRDNZ must be pulsed low for a minimum of TPWRDNZ, or 10 ns after
VCC and VCC2 are up and stable.
D. There is a minimum of
TLVDS_ARSTZ, or 2 μs, wait time from PWRDNZ going high for the LVDS receiver
to recover.
E. After the DMD micromirror park sequence
is complete, the DLP controller software initiates a hardware power-down that activates
the PWRDNZ and disables VCC2.
F. Under power-loss conditions, where
emergency DMD micromirror park procedures are being enacted by the DLP controller
hardware, PWRDNZ goes low.
G. VCC must remain high until
after VCC2 goes low.
H. To prevent excess current, the supply voltage
delta |VCCI – VCC| must be less than specified limit in Section 6.4.