AMIS-30521 Datasheet, PDF (6/26 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver

AMIS-30521 Micro-stepping Motor Driver
Data Sheet
6.4 AC Parameters
The AC parameters are given for V_BB and temperature in their operating ranges.
Table 6: AC Parameters
Symbol Pin(s) Parameter
Internal Oscillator
f_osc
Frequency of internal oscillator
Motordriver
f_PWM
PWM frequency
MOTxx ^{Double PWM frequency}
f_j
PWM Jitter frequency
f_d
PWM Jitter depth
Tb_rise
MOTxx turn-on voltage slope, 10% to 90%
Tb_fall
MOTxx turn-off voltage slope, 90% to 10%
Digital Outputs
T_H2L
DO
ERRB
Output fall-time from V_inH to V_inL
Charge Pump
f_CP
CPN CPP Charge pump frequency
T_CPU
MOTxx Start-up time of charge pump
CLR Function
T_CLR
CLR Hard reset duration time
Remark/Test Conditions
Frequency depends only on
internal oscillator
EMC[1:0] = 00
EMC[1:0] = 01
EMC[1:0] = 10
EMC[1:0] = 11
EMC[1:0] = 00
EMC[1:0] = 01
EMC[1:0] = 10
EMC[1:0] = 11
Capacitive load 400pF and pull-
up resistor of 1.5 kΩ
Spec external components
Min.
3.6
20.8
41.6
20
6.5 SPI Timing
Table 7: SPI Timing Parameters
Symbol
Parameter
t_CLK
t_{CLK_HIGH}
SPI clock period
SPI clock high time
t_{CLK_LOW}
SPI clock low time
t_{SET_DI}
DI set up time, valid data before rising edge of CLK
t_{HOLD_DI}
DI hold time, hold data after rising edge of CLK
t_{CSB_HIGH}
t_{SET_CSB}
CSB high time
CSB set up time, CSB low before rising edge of CLK
t_{SET_CLK}
CLK set up time, CLK low before rising edge of CSB
Min.
1
100
100
50
50
2.5
100
100
Typ.
4
22.8
45.6
tbd
tbd
150
100
50
25
150
100
50
25
250
Typ.
Max.
4.4
24.8
49.6
50
90
Max.
Unit
MHz
kHz
kHz
Hz
% f_PWM
V/µs
V/µs
V/µs
V/µs
V/µs
V/µs
V/µs
V/µs
ns
kHz
µs
Unit
µs
ns
ns
ns
ns
µs
ns
ns
CS
0,2 VCC
tSET_CSB
tCLK
tSET_CLK
0,2 VCC
CLK
DI
0,2 VCC
tSET_DI
0,8 VCC
tCLK_HI
tHOLD_DI
tCLK_LO
0,8 VCC
VALID
0,2 VCC
PC20070608.1
Figure 4: SPI Timing
AMI Semiconductor – June 2007, M-20683-001
6
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