SC16C652B datasheet(7/44 Pages) PHILIPS

7 / 44 page

Philips Semiconductors

SC16C652B

Dual UART with 32-byte FIFOs and IrDA encoder/decoder

Product data

Rev. 03 — 10 December 2004

7 of 44

9397 750 14452

RTSA,

RTSB

33, 22

23, 15

Request to Send (Active-LOW). These outputs are associated with individual

UART channels, A through B. A logic 0 on the RTS pin indicates the transmitter

has data ready and waiting to send. Writing a logic 1 in the modem control register

MCR[1] will set this pin to a logic 0, indicating data is available. After a reset this

pin will be set to a logic 1. This pin has no effect on the UART’s transmit or receive

operation.

RXA,

RXB

5, 4

4, 3

Receive data A, B. These inputs are associated with individual serial channel

data to the SC16C652B receive input circuits, A-B. The RX signal will be a logic 1

during reset, idle (no data), or when the transmitter is disabled. During the local

loop-back mode, the RX input pin is disabled and TX data is connected to the

UART RX input, internally.

TXA, TXB 7, 8

5, 6

Transmit data A, B. These outputs are associated with individual serial transmit

channel data from the SC16C652B. The TX signal will be a logic 1 during reset,

idle (no data), or when the transmitter is disabled. During the local loop-back

mode, the TX output pin is disabled and TX data is internally connected to the

UART RX input.

Table 2:

Pin description…continued

Symbol

Type Description

LQFP48 HVQFN32

SC16C652B Datasheet(PDF) 7 Page - NXP Semiconductors