SPC574K72E5 datasheet(18/127 Pages) STMICROELECTRONICS

18 / 127 page

Package pinouts and signal descriptions

SPC574Kxx

18/127

DocID023601 Rev 5

Note:

The FusionQuad® package is for development purposes only and is not available as a

production device. The FusionQuad package is not intended to be qualified and is available

only in small quantities.

2.2

Pin descriptions

The following sections provide signal descriptions and related information about device

functionality and configuration.

2.2.1

Power supply and reference voltage pins

The Supply Pins Table contains information on power supply and reference pins. See the

Signal Table (Excel file) attached to this document. Locate the paperclip symbol on the left

side of the PDF window, and click it. Double-click on the excel file to open it and select the

Supply Pins Table tab.

Note:

All ground supplies must be toed to ground. They must not float.

2.2.2

System pins

Table 3 contains information on system pin functions for the devices.

Table 3. System pins

Symbol

Description

Direction

QFP pin

144

FQ172

176

FQ216

PORST

Power on reset with Schmitt trigger characteristics and

noise filter. PORST is active low

Bidirectional

121

ESR0

External functional reset with Schmitt trigger

characteristics and noise filter. ESR0 is active low

Bidirectional

122

TESTMODE Pin for testing purpose only.



An internal pull-down is implemented on the

TESTMODE pin to prevent the device from entering

TESTMODE. It is recommended to connect the

TESTMODE pin to VSS_HV_IO on the board. The value

of the TESTMODE pin is latched at the negation of

reset and has no affect afterward. The device will not

exit reset with the TESTMODE pin asserted during

power-up.

Input only

118

XTAL

Analog output of the oscillator amplifier circuit



needs to be grounded if oscillator is used in bypass

mode.

Output

103

EXTAL

Analog input of the oscillator amplifier circuit when

oscillator is not in bypass mode



Analog input for the clock generator when oscillator is

in bypass mode

Input

102

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