87LPC768 datasheet(37/64 Pages) PHILIPS

部件名	87LPC768

功能描述	Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D,and Pulse Width Modulator

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制造商	PHILIPS [NXP Semiconductors]

网页	http://www.nxp.com

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37 / 64 page

Philips Semiconductors

Preliminary data

87LPC768

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

with 4 kB OTP 8-bit A/D, Pulse Width Modulator

2001 Aug 06

35

Low Voltage EPROM Operation

The EPROM array contains some analog circuits that are not

required when VDD is less than 4 V, but are required for a VDD

greater than 4 V. The LPEP bit (AUXR.4), when set by software, will

power down these analog circuits resulting in a reduced supply

current. LPEP is cleared only by power-on reset, so it may be set

ONLY for applications that always operate with VDD less than 4 V.

Reset

The 87LPC768 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

SU01391

87LPC768

VDD

8.2 k

W

10

mF

RST

2.2

mF

Figure 23. Typical External Reset Circuits

SU01170

CHIP RESET

CPU

CLOCK

Q

RESET

TIMING

RPD (UCFG1.6)

WDT

MODULE

SOFTWARE RESET

SRST (AUXR1.3)

POWER MONITOR

RESET

RST/VPP PIN

WDTE (UCFG1.7)

S

R

Figure 24. Block Diagram Showing Reset Sources

类似零件编号 - 87LPC768

制造商	部件名	数据表	功能描述
NXP Semiconductors	87LPC762	312Kb / 57P	Low power, low price, low pin count 20 pin microcontroller with 2 kbyte OTP 2001 Oct 26
	87LPC764	307Kb / 56P	Low power, low price, low pin count 20 pin microcontroller with 4 kbyte OTP 2001 Oct 26
	87LPC767	320Kb / 60P	Low power, low price, low pin count 20 pin microcontroller with 4-kbyte OTP and 8-bit A/D converter 2001 Aug 07
	87LPC769	306Kb / 61P	Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D, and DAC 2001 Jan 11

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类似说明 - 87LPC768

制造商	部件名	数据表	功能描述
NXP Semiconductors	87LPC769	306Kb / 61P	Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D, and DAC 2001 Jan 11
	87LPC767	320Kb / 60P	Low power, low price, low pin count 20 pin microcontroller with 4-kbyte OTP and 8-bit A/D converter 2001 Aug 07
	87LPC764	307Kb / 56P	Low power, low price, low pin count 20 pin microcontroller with 4 kbyte OTP 2001 Oct 26
	P87LPC764BN112	329Kb / 60P	Low power, low price, low pin count (20 pin) microcontroller with 4 kbyte OTP 2003 Sep 03
	P87LPC764	322Kb / 60P	Low power, low price, low pin count (20 pin) microcontroller with 4 kbyte OTP 2003 Sep 03
	87LPC762	312Kb / 57P	Low power, low price, low pin count 20 pin microcontroller with 2 kbyte OTP 2001 Oct 26
	P87LPC759	168Kb / 38P	Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP 2002 Mar 21
	P87LPC760	290Kb / 56P	Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP 2002 Mar 07
	P87LPC761	299Kb / 58P	Low power, low price, low pin count (16 pin) microcontroller with 2 kbyte OTP 2002 Mar 07
ATMEL Corporation	AT83EB5114	1Mb / 95P	Low-pin-count 8-bit microcontroller with A/D converter