AMIS-30624 Datasheet, PDF (10/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

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