AMIS-30624 I2C Microstepping Motordriver
Data Sheet
11.0 AC Parameters
The AC parameters are given for Vbb and temperature in their operating ranges. All timing values of the I2C transceiver are referred to
IHman and VILmax levels (see Figure 5).
V
Table 6: AC Parameters
Symbol
Power-up
Tpu
Pin(s)
Parameter
Test Conditions
Min.
Typ.
Max.
10
Unit
ms
Power-up time
Guaranteed by design
Internal Oscillator
fosc
Frequency of internal oscillator
3.6
4.0
4.4
MHz
I2C Transceiver (Generic)
CB
Capacitive load of each bus line
Capacitance of SDA / SCK pin
400 (1)
10
pF
pF
SDA
SCK
CI
Pulse width of spikes which must be
suppressed by the input filter
tSP
50
ns
I2C Transceiver (Standard Mode)
fSCL
SCL clock frequency
100
kHz
µs
Hold time (repeated) START condition.
After this period the first clock pulse is
generated.
tHD,START
4.0
tLOW
tHIGH
LOW period of the SCK clock
HIGH period of the SCK clock
4.7
4.0
µs
µs
Set-up time for
condition
a repeated START
tSU,START
4.7
µs
SDA
SCK
tHD,DATA
tSU,DATA
tR
Data hold time for I2C bus devices
0 (2)
250
3.45 (3)
µs
ns
µs
µs
µs
Data set-up time
Rise time of SDA and SCK signals
Fall time of SDA and SCK signals
Set-up time for STOP condition
1.0
0.3
tF
tSU,STOP
4.0
4.7
Bus free time between STOP and
START condition
I2C Transceiver (Fast Mode)
tBUF
µs
fSCL
SCL clock frequency
360
kHz
µs
Hold time (repeated) START condition.
After this period the first clock pulse is
generated.
tHD,START
0.6
tLOW
tHIGH
LOW period of the SCK clock
HIGH period of the SCK clock
1.3
0.6
µs
µs
Set-up time for
condition
a repeated START
tSU,START
0.6
µs
SDA
SCK
tHD,DATA
tSU,DATA
tR
Data hold time for I2C bus devices
0 (2)
100 (4)
0.9 (3)
µs
ns
ns
ns
µs
Data set-up time
Rise time of SDA and SCK signals
Fall time of SDA and SCK signals
Set-up time for STOP condition
20 + 0.1CB
20 + 0.1CB
0.6
300
300
tF
tSU,STOP
Bus free time between STOP and
START condition
tBUF
1.3
µs
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
10
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