87C654 Philips Semiconductors, 87C654 Datasheet - Page 15

• Manufacturer Part Number: 87C654
• Description: 80C51 8-bit microcontroller 8K/16K/ 256 OTP/ I2C
• Manufacturer: Philips 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
Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS – I
NOTES:
TIMING SIO1 (I
1996 Aug 16
SYMBOL
t
t
t
t
t
t
t
t
t
SU
SU
SU
HD
SU
SU
BUF
RD
FD
CMOS single-chip 8-bit microcontroller
SCL TIMING CHARACTERISTICS
t
t
t
t
t
SDA TIMING CHARACTERISTICS
(INPUT/OUTPUT)
(INPUT/OUTPUT)
SCL = 400pF.
I
HD
LOW
HIGH
RC
FC
CLCL
2
; DAT1
; DAT2
; DAT3
; STA
; STO
; DAT
C-bus specification for bit-rates up to 100 kbit/s.
; STA
SDA
SCL
= 1/f
START or repeated START condition
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 < t
2
C) INTERFACE
t
HD;STA
t
FD
t
t
LOW
RC
PARAMETER
t
RD
t
HIGH
t
FC
t
SU;DAT1
2
C INTERFACE
CLCL
t
HD;DAT
15
will be filtered out. Maximum capacitance on bus-lines SDA and
CLCL
< 285ns (16MHz) > f
repeated START condition
STOP condition
INPUT
14 t
16 t
14 t
14 t
14 t
14 t
250ns
250ns
250ns
0.3 s
0.3 s
1 s
0ns
1 s
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
OSC
t
> 3.5MHz) the SI01 interface meets the
SU;DAT2
t
SU;STA
t
SU;STO
0.7 V
0.3 V
t
SU;DAT3
CC
CC
t
> 20 t
BUF
> 8 t
OUTPUT
> 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
> 1 s
CLCL
Product specification
CLCL
–
–
CLCL
0.7 V
0.3 V
2
2
START condition
87C654
1
– t
– t
1
1
1
3
1
1
1
3
CC
CC
FC
RD
SU00107A