HT45B0F datasheet(1/23 Pages) HOLTEK

No. de pieza	HT45B0F

Descripción Electrónicos	SPI-to-UART Bridge

PDF	23 Pages

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Fabricante Electrónico	HOLTEK [Holtek Semiconductor Inc]

Página de inicio	http://www.holtek.com

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HT45B0F

SPI-to-UART Bridge

Block Diagram

Rev. 1.00

1

June 7, 2011

Features

· Operating Voltage

- fCLKI= 12MHz: 2.0V~5.5V

- fCLKI= 16MHz: 2.7V~5.5V

- fCLKI= 20MHz: 4.5V~5.5V

· Glueless slave SPI interface to Holtek¢s MCU

· Full-duplex, Universal Asynchronous Receiver and

Transmitter (UART) communication

- 8 or 9 bit character length

- Even, odd or no parity options

- One or two stop bits

- Baud rate generator with 8-bit prescaler

- Parity, framing, noise and overrun error detection

- Support for interrupt on address detect

- Address Detect Interrupt - last character bit=1

- Transmitter and receiver enabled independently

- 4-byte deep FIFO receiver data buffer

- Transmit and Receive Multiple Interrupt

Generation Sources:

¨ Transmitter Empty

¨ Transmitter Idle

¨ Receiver Full

¨ Receiver Overrun

¨ Address Mode Detect

- TX pin is high impedance when the UART transmit

module is disabled

- RX pin is high impedance when the UART receive

module is disabled

· CMOS clock input, CLKI, up to 20MHz at 5V

operating voltage

· 16-pin NSOP package

General Description

The HT45B0F is microcontroller peripheral device to im-

plement SPI-to-UART data conversions. The UART

module can operate in full-duplex mode with an interrupt

output capability to the host microcontroller.

Possible application could include data communication

networks between microcontrollers, low-cost data links

between PCs and peripheral devices, portable and bat-

tery operated devices, factory automation and process

control to name but a few.

S D I

S D O

S C K

S C S

C L K I

I N T

V D D

G N D

U A R T

M o d u l e

S e r i a l

I / O

I n t e r f a c e

V D D

T X

R X

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