L6245 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6245' PDF : 15 Pages View PDF
L6245
PIN DESCRIPTION [Pin Types: I = Input, O = Output, P = Power, A = Analog (passive)]
Power
Pin Number
12, 17
24,
3
7, 42, 64
10
59
Pin Name
VPOW ER
VDIG
VCC
GND
VREF
POR
61
POR_DLY
62
POR_FILT
5
CPC
6
CPL
Pin Type
Description
P
Positive supply, nominally 5V.
P
Ground.
I
All analog signals are referenced to this voltage, nominally 2V.
0
POWER ON RESET - Goes low when the supply voltage is below the
VOLTAGE GOOD threshold. POR is an open collector output with an
internal 20kΩ pull-up.
A
POR DELAY. An external parallel RC network from this pin to ground
sets the time the POR signal stays active after voltage good.
A
An external capacitor from this pin to ground provides filtering for the
VCC sense input of the POR circuit.
A
Charge pump capacitor
A
Charge pump inductor
Microprocessor Interface
Pin Number
25
26
27
28
29
30
31
32
38
39
35
Pin Name
D7
D6
D5
D4
D3
D2
D1
D0
RD
WR
MC_CS
41
SYSCLK
33
A0
34
A1
35
A2
37
AS
43
MC_ERR
40
DTACK
Pin Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
O
O
Description
An 8-bit bidirectional data bus which is connected to the internal
registers.
READ A low level on this pin allows the bus to be driven by the IC.
A low level on WRITE allows the IC to read data from the system bus.
CHIP SELECT A low level on this pin selects the IC for bus
transactions.
Microprocessor clock used for internal timing.
The lowest three bits of the system address bus; used to address
internal registers
ADDRESS STROBE The address appearing on A [0:2] is latched on
the falling edge of the AS pulse.
A maskable interrupt signal which is asserted low when an error flag in
the Status Register is set. The output is open-drain with an internal
20KΩ pull-up.
An open drain, active low signal used for asynchronous bus
transactions.
Brushless, Sensorless Motor Driver and 8 bit D/A
Pin Number
47
48
45
53
57
60
Pin Name
SPIN_DAC
SPIN_CMD
COIL_CT
COIL_U
COIL_V
COIL_W
Pin Type
O
I
I
O
Description
The output of an 8 bit D/A used for the command to the spindle driver.
The input to the spindle driver transconductance amplifier.
The center tap of the motor is connected to this pin.
The motor coils are driven by these outputs. Back EMF is also sensed
at these pins.
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