SC16IS74Q900 datasheet(7/63 Pages) NXP

Part #	SC16IS74Q900

Description	Single UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs

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Manufacturer	NXP [NXP Semiconductors]

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SC16IS740_750_760

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Product data sheet

Rev. 7 — 9 June 2011

7 of 63

NXP Semiconductors

SC16IS740/750/760

Single UART with I2C-bus/SPI interface, 64-byte FIFOs, IrDA SIR

6.2 Pin description

a. I2C-bus interface

b. SPI interface

Fig 7.

Pin configuration for HVQFN24

A0

I2C

VDD

XTAL1

RESET

XTAL2

002aab015

GPIO5/DTR

GPIO4/DSR

GPIO3

GPIO2

GPIO1

VSS

SC16IS750IBS

SC16IS760IBS

Transparent top view

terminal 1

index area

6

13

5

14

4

15

3

16

2

17

1

18

CS

SPI

VDD

XTAL1

RESET

XTAL2

002aab401

GPIO5/DTR

GPIO4/DSR

GPIO3

GPIO2

GPIO1

VSS

SC16IS750IBS

SC16IS760IBS

Transparent top view

terminal 1

index area

6

13

5

14

4

15

3

16

2

17

1

18

Table 2.

Pin description

Symbol

Type Description

TSSOP16 TSSOP24 HVQFN24

CTS

11

1

22

I

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

indicates the modem or data set is ready to accept transmit data

from the SC16IS740/750/760. 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

Register EFR[7] for hardware flow control operation.

TX

12

2

23

O

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.

RX

13

3

24

I

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

14

4

1

I

device hardware reset (active LOW)[1]

XTAL1

15

5

2

I

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

16

6

3

O

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

a crystal oscillator output.

VDD

1

7

4

-

power supply

I2C/SPI

88

5

I

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

pin is at logic HIGH. SPI interface is selected if this pin is at logic

LOW.

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