P87C554 datasheet(71/77 Pages) PHILIPS

Part #	P87C554

Description	80C51 8-bit microcontroller - 12 clock operation 16K/512 OTP/RAM 8 channel 10-bit A/D, I2C, PWM, capture/compare, high I/O

PDF	77 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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71 / 77 page

Philips Semiconductors

Product data

P87C554

80C51 8-bit microcontroller – 12 clock operation

16K/512 OTP/RAM, 8 channel 10-bit A/D, I2C, PWM,

capture/compare, high I/O

2002 Mar 25

2.4V

0.45V

2.0V

0.8V

NOTE:

AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.45V for a logic ‘0’.

Timing measurements are made at 2.0V for a logic ‘1’ and 0.8V for a logic ‘0’.

Test Points

2.0V

0.8V

SU00215

Figure 54. AC Testing Input/Output

2.4V

NOTE:

The float state is defined as the point at which a port 0 pin sinks 3.2mA or sources 400

µA at the voltage test levels.

2.4V

0.45V

Float

2.0V

0.8V

2.0V

0.8V

SU00216

Figure 55. AC Testing Input, Float Waveform

tRD

tSU;STA

tBUF

tSU;STO

0.7 VCC

0.3 VCC

0.7 VCC

0.3 VCC

tFD

tRC

tFC

tHIGH

tLOW

tHD;STA

tSU;DAT1

tHD;DAT

tSU;DAT2

tSU;DAT3

START condition

repeated START condition

SDA

(INPUT/OUTPUT)

SCL

(INPUT/OUTPUT)

STOP condition

START or repeated START condition

SU00107A

Figure 56. Timing SIO1 (I2C) Interface

P87C554 Datasheet(PDF) 71 Page - NXP Semiconductors

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