IDT79R4650
Pin Name
VCCOk
Type
Input
ColdReset*
Input
Reset*
Input
ModeClock
ModeIn
Output
Input
COMMERCIAL TEMPERATURE RANGE
Description
VCC is OK
When asserted, this signal indicates to the R4650 that the 3.3V (5.0V) power supply has
been above 3.0V (4.5V) for more than 100 milliseconds and will remain stable. The
assertion of VCCOk initiates the reading of the boot-time mode control serial stream.
Cold reset
This signal must be asserted for a power on reset or a cold reset. ColdReset must be de-
asserted synchronously with MasterClock.
Reset
This signal must be asserted for any reset sequence. It may be asserted synchronously
or asynchronously for a cold reset, or synchronously to initiate a warm reset. Reset must
be de-asserted synchronously with MasterClock.
Boot mode clock
Serial boot-mode data clock output at the system clock frequency divided by two hun-
dred and fifty six.
Boot mode data in
Serial boot-mode data input.
5.8
13