ZSPM2000 Datasheet

© 2016 Integrated Device Technology, Inc.

23

January 27, 2016

3.5.

GPIO0 Pin Configuration

The ZSPM2000 offers a flexible configuration scheme for its digital I/O pin. This enables using the GPIO0 pin

(general purpose input/output) with different functions depending on the application requirements. The configura-

tion options are listed in Table 3.3.

Table 3.3

GPIO0 Pin Configuration Options

Pin

Thermal shutdown

Hardwire Option

GPIO0

High and low active

High and low active

The GPIO pin can be hardwired to be high or low, or it can be used as a thermal shutdown input. If the pin is

asserted by an external source, for example the thermal shutdown flag of an external temperature sensor, the

ZSPM2000 flags an external over-temperature fault and reacts accordingly.

3.6.

Configuration

The ZSPM2000 incorporates two different sets of configuration parameters. The first set of configuration param-

eters can be configured during design time and cannot be changed during run-time. The second set of config-

uration parameters can be configured during design time, but can also be reconfigured during run-time using the

appropriate PMBus™ command. Note that these reconfigured values are not stored in the OTP memory, so they

are lost during power cycling the device.

In order to evaluate the device and its configuration on the bench, a special engineering mode is supported by the

device and Pink Power Designer™ GUI; i.e. the device can be reconfigured multiple times without writing the

configuration into the OTP. During this engineering mode, the device starts up after power-on reset in an uncon-

figured state. The Pink Power Designer™ then provides the configuration to the ZSPM2000, enabling full

operation without actually configuring the OTP. The engineer can use this mode to evaluate the configuration on

the bench. However, the configuration will be lost upon power-on-reset.

After the design engineer has determined the final configuration options, an OTP image can be created that is

then written into the ZSPM2000. This can be either on the bench using the Pink Power Designer™ or in end–of-

line testing during mass production.