SC68C652B datasheet(7/43 Pages) NXP

部品番号	SC68C652B

部品情報	5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.) with 32-byte FIFOs, IrDA encoder/decoder, and 68 mode mP interface

PDF	43 Pages

Scroll/Zoom	100%

メーカー	NXP [NXP Semiconductors]

ホームページ	http://www.nxp.com

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7 / 43 page

SC68C652B_2

Product data sheet

Rev. 02 — 2 November 2009

7 of 43

NXP Semiconductors

SC68C652B

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

VCC

19, 42

Power supply input.

XTAL1

Crystal or external clock input. Functions as a crystal input or as

an external clock input. A crystal can be connected between this

pin and XTAL2 to form an internal oscillator circuit (see Figure 3).

This conﬁguration requires an external 1 M

Ω resistor between the

XTAL1 and XTAL2 pins. Alternatively, an external clock can be

connected to this pin to provide custom data rates. See Section 6.8

“Programmable baud rate generator”.

XTAL2

Output of the crystal oscillator or buffered clock. (See also

XTAL1.) XTAL2 is used as a crystal oscillator output or a buffered

clock output. Should be left open if an external clock is connected

to XTAL1. For extended frequency operation, this pin should be tied

to VCC via a 2 kΩ resistor.

Table 2.

Pin description …continued

Symbol

Type

Description

SC68C652B データシート(PDF) 7 Page - NXP Semiconductors