AMIS-30622 Datasheet, PDF (34/42 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30622
9.2.4.6. Timing and electrical characteristics of the serial interface
START
START
STOP
START
SDA
t_f
SCK
t_LOW
t_r
t_SU;DAT t_f
t_HD;STA
t_HD;DAT t_HIGH
t_SU;STA
See § 5 and § 6 for DC and AC parameter values
t_HD;STA
t_r
t_BUF
t_SU;STO
9.2.4.7. Description of Application Commands
Communications between the AMIS-30622 and a 2-wire Serial Bus Interface Master takes place via a large set
of commands.
Reading commands are used to:
• Get actual status information, e.g. error flags
• Get actual position of the Stepper Motor
• Verify the right programming and configuration of the AMIS-30622
Writing commands are used to:
• Program the OTP Memory
• Configure the positioner with motion parameters (max/min speed, acceleration, stepping mode, etc.)
• Provide target positions to the Stepper motor
9.2.4.8. Command Overview
Command mnemonic
Function
Command byte
Binary Hexadecimal
GetFullStatus1
Returns complete status of the chip
“1000 0001”
0x81
GetFullStatus2
Returns actual, target and secure position “1111 1100”
0xFC
GetOTPParam
Returns OTP parameter
“1000 0010”
0x82
GotoSecurePosition Drives motor to secure position
“1000 0100”
0x84
HardStop
Immediate full stop
“1000 0101”
0x85
ResetPosition
Sets actual position to zero
“1000 0110”
0x86
ResetToDefault
Overwrites the chip RAM with OTP contents “1000 0111”
0x87
RunInit
Reference Search
“1000 1000”
0x88
SetMotorParam
Sets motor parameter
“1000 1001”
0x89
SetOTP
Zaps the OTP memory
“1001 0000”
0x90
SetPosition
Programmes a target and secure position “1000 1011”
0x8B
SoftStop
Motor stopping with deceleration phase
“1000 1111”
0x8F
Rev. 3 | Page 34 of 42 | www.onsemi.com