4.14 Device Power Up
The GS1559 has a recommended power supply sequence. To ensure correct power up,
power the CORE_VDD pins before the IO_VDD pins.
Device pins may also be driven prior to power up without causing damage.
To ensure that all internal registers are cleared upon power-up, the application layer
must hold the RESET_TRST signal LOW for a minimum of 1ms after the core power
supply has reached the minimum level specified in DC Electrical Characteristics on
page 16. See Figure 4-16.
4.15 Device Reset
In order to initialize all internal operating conditions to their default states the
application layer must hold the RESET_TRST signal LOW for a minimum of treset = 1ms.
When held in reset, all device outputs will be driven to a high-impedance state.
+1.8V
+1.65V
CORE_VDD
treset
t
reset
RESET_TRST
Reset
Reset
Figure 4-16: Reset Pulse
GS1559 HD-LINX™ II Multi-Rate Deserializer with
Loop-Through Cable Driver
Data Sheet
64 of 71
30572 - 8
July 2008
GENNUM [ GENNUM CORPORATION ]
