L6470HTR STMicroelectronics, L6470HTR Datasheet - Page 19

• Manufacturer Part Number: L6470HTR
• Description: IC STEPPER/DC MOTOR DVR 28HTSSOP
• Manufacturer: STMicroelectronics

Specifications of L6470HTR

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10812-2

L6470
6
6.1
6.2
6.3
Functional description
Device power-up
At power-up end, the device state is the following:
●
●
●
●
●
During power-up the device is under reset (all logic IO disabled and power bridges in high
impedance state) until the following conditions are satisfied:
●
●
●
Any motion command makes the device exiting from High Z state (HardStop and SoftStop
included).
Logic I/O
Pins CS, CK, SDI, STCK, SW and STBY\RST are TTL/CMOS 3.3V-5V compatible logic
inputs.
Pin SDO is a TTL/CMOS compatible logic output. VDD pin voltage sets the logic output pin
voltage range; when it is connected to VREG or 3.3V external supply voltage, the output is
3.3V compatible. When VDD is connected to a 5V supply voltage, SDO is 5V compatible.
VDD is not internally connected to V
A 10 µF capacitor should be connected to V
Pins FLAG and BUSY\SYNC are open drain outputs.
Charge pump
To ensure the correct driving of the high side integrated mosfets a voltage higher than the
motor power supply voltage needs to be applied to the VBOOT pin. The high side gate
driver supply voltage V
realizing a charge pump (see
Registers are set to default,
Internal logic is driven by internal oscillator and a 2MHz clock is provided by OSCOUT
pin,
Bridges are disabled (High Z),
UVLO bit in STATUS register is forced low (fail condition),
FLAG output is forced low
V
V
Internal oscillator is operative.
S
REG
is greater than V
is greater than V
boot
SthOn
is obtained through an oscillator and a few external components
REGth
Figure
,
Doc ID 16737 Rev 2
,
REG
4).
, an external connection is always needed.
DD
pin in order to obtain a proper operation.
Functional description
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