87LPC769 datasheet(35/61 Pages) PHILIPS

Part #	87LPC769

Description	Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D, and DAC

PDF	61 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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35 / 61 page

Philips Semiconductors

Preliminary specification

87LPC769

Low power, low price, low pin count (20 pin)

microcontroller with 4 kB OTP 8-bit A/D, and DAC

2001 Jan 11

Reset

The 87LPC769 has an active low reset input when configured for an

external reset. A fully internal reset may also be configured which

provides a reset when power is initially applied to the device. The

watchdog timer can act as an oscillator fail detect because it uses

an independent, fully on-chip oscillator.

The external reset input is disabled, and fully internal reset

generation enabled, by programming the RPD bit in the EPROM

configuration register UCFG1 to 0. EPROM configuration is

described in the section EPROM Characteristics

SU01384

87LPC769

VDD

8.2 k

RST

2.2

Figure 23. Typical External Reset Circuits

SU01170

CHIP RESET

CPU

CLOCK

RESET

TIMING

RPD (UCFG1.6)

WDT

MODULE

SOFTWARE RESET

SRST (AUXR1.3)

POWER MONITOR

RESET

RST/VPP PIN

WDTE (UCFG1.7)

Figure 24. Block Diagram Showing Reset Sources

87LPC769 Datasheet(PDF) 35 Page - NXP Semiconductors