80C554 Datasheet, PDF (70/76 Pages) NXP Semiconductors – 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP

Philips Semiconductors
80C51 8-bit microcontroller – 6 clock operation
16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I²C, PWM,
capture/compare, high I/O, 64L LQFP
Preliminary specification
80C554/83C554/87C554
2.4V
0.45V
2.0V
0.8V
Test Points
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’.
Figure 54. AC Testing Input/Output
SU00215
2.4V
2.0V
Float
2.0V
2.4V
0.45V
0.8V
0.8V
0.45V
NOTE:
The float state is defined as the point at which a port 0 pin sinks 3.2mA or sources 400µA at the voltage test levels.
SU00216
Figure 55. AC Testing Input, Float Waveform
START or repeated START condition
t_RD
SDA
(INPUT/OUTPUT)
SCL
(INPUT/OUTPUT)
t_FD
t_RC
t_HD;STA t_LOW
t_HIGH
repeated START condition
STOP condition
t_SU;STA
START condition
t_FC
t_SU;DAT1
t_HD;DAT
Figure 56. Timing SIO1 (I²C) Interface
t_BUF
t_SU;STO
0.7 V_CC
0.3 V_CC
t_SU;DAT3
t_SU;DAT2
0.7 V_CC
0.3 V_CC
SU00107A
2000 Nov 10
70