PI7C9X760ACLEX datasheet(5/53 Pages) DIODES

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www.diodes.com

April 2019

Diodes Incorporated

PI7C9X760

Document Number DS40305 Rev 6-2

A product Line of

Diodes Incorporated

PI7C9X760

Pin Description

Name

16-TSSOP

Pin#

24-TSSOP

Pin#

24-TQFN

Pin#

Type Description

I2C (SPI) INTERFACE

CTS

UART clear to send (active LOW). A logic 0 (LOW) on the CTS

pin indicates the modern or data set is ready to accept trans-

mit data from the PI7C9X760. Status can be tested by reading

MSR[4]. This pin only affects the transmit and receive operations

when auto CTS function is enabled via the Enhanced Feature

UART transmitter output. During the local Loopback mode, the

TX output pin is disabled and TX data is internally connected to

the UART RX input.

UART receiver input. During the local Loopback mode, the RX

input pin is disabled and TX data is connected to the UART RX

input internally.

RESET

Device hardware reset (active LOW).

XTAL1

Crystal input or external clock input. Functions as a crystal

input or as an external clock input. A crystal can be connected

between XTAL1 and XTAL2 to form an internal oscillator

circuit (see Figure 16). Alternatively, an external clock can be

connected to this pin.

XTAL2

Crystal output or clock output. (See also XTAL1.) XTAL2 is used

as a crystal oscillator output.

VDD

Power supply.

I2C/SPI

I2C-bus or SPI interface select. I2C-bus interface is selected if

this pin is HIGH. SPI interface is selected if this pin is LOW.

CS/A0

SPI chip select or I2C-bus device address select A0. If SPI con-

figuration is selected by I2C/SPI pin, this pin is the SPI chip se-

lect pin (Schmitt-trigger, active LOW).If I2C-bus configuration

is selected by I2C/SPI pin, this pin along with the A1 pin allows

user to change the device's base address.

SI/A1

SPI chip select or I2C-bus device address select A1. If SPI con-

figuration is selected by I2C/SPI pin, this is the SPI data input

pin. If I2C-bus configuration is selected by I2C/SPI pin, this pin

along with the A0 pin allows user to change the device's base ad-

dress. To select the device address, please refer to Table 9.

SPI data output pin. If SPI configuration is selected by I2C/SPI

pin, this is a tri-state output pin. If I2C-bus configuration is

selected by I2C/SPI pin, this pin function is undefined and must

be left as N.C. (not connected).

SCL/SCLK 5

I2C-bus or SPI input clock.

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