P87C554 NXP Semiconductors, P87C554 Datasheet - Page 68

• Manufacturer Part Number: P87C554
• Description: The P87C554 Single-Chip 8-Bit Microcontroller is manufactured inan advanced CMOS process and is a derivative of the 80C51microcontroller family
• Manufacturer: NXP Semiconductors

1. At 100 kbit/s. At other bit rates this value is inversely proportional to the bit-rate of 100 kbit/s.
2. Determined by the external bus-line capacitance and the external bus-line pull-resistor, this must be < 1 s.
3. Spikes on the SDA and SCL lines with a duration of less than 3 t
4. t
5. These values are guaranteed but not 100% production tested.
Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS (Continued)
NOTES:
2002 Mar 25
I
t
t
t
t
t
t
t
t
t
t
t
t
t
t
SYMBOL
2
HD;STA
LOW
HIGH
RC
FC
SU;DAT1
SU;DAT2
SU;DAT3
HD;DAT
SU;STA
SU;STO
BUF
RD
FD
80C51 8-bit microcontroller – 12 clock operation
16K/512 OTP/RAM, 8 channel 10-bit A/D, I
capture/compare, high I/O
C Interface (Refer to Figure 56)
SCL = 400pF.
interface meets the I
CLCL
= 1/f
OSC
START condition hold time
SCL low time
SCL high time
SCL rise time
SCL fall time
Data set-up time
SDA set-up time (before rep. START cond.)
SDA set-up time (before STOP cond.)
Data hold time
Repeated START set-up time
STOP condition set-up time
Bus free time
SDA rise time
SDA fall time
= one oscillator clock period at pin XTAL1. For 62ns (42s) < t
2
C-bus specification for bit-rates up to 100 kbit/s.
PARAMETER
5
2
C, PWM,
CLCL
66
will be filtered out. Maximum capacitance on bus-lines SDA and
CLCL
< 285ns (16 MHz (24Hz) > f
INPUT
14 t
16 t
14 t
14 t
14 t
14 t
0.3 s
250ns
250ns
250ns
0.3 s
1 s
1 s
0ns
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
OSC
> 3.5 MHz) the SI01
> 20 t
> 8 t
> 4.0 s
> 4.7 s
> 4.0 s
< 0.3 s
> 4.7 s
> 4.0 s
> 4.7 s
< 0.3 s
OUTPUT
> 8 t
> 1 s
CLCL
CLCL
–
–
CLCL
2
2
– t
– t
1
P87C554
1
1
1
3
1
1
1
3
FC
RD
Product data