STA1050

Pin function description

5/11

33

FE_VDDA33R

Analog 3.3V for Bandgap

Vdd

34

FE_CEXT

external cap for bandgap (1nF)

analog

35

FE_REXT

external res for bandgap (25kOhm)

analog

36

FE_VSSA33R

Analog Ground Bandgap

Vss

37

FE_MD_LAS

Laser driver input from monitor diode

analog in

38

FE_CAP_LAS

Laser driver compensation cap (30nF)

analog

39

FE_LD_LAS

First Laser driver output

analog out

40

FE_LD1_LAS

Second Laser driver output

analog out

41

FE_VDDPAD2

3.3V for AFE pad ring

Vdd

42

FE_VDDA33T

Analog 3.3V for test buffer

Vdd

43

FE_TESTP

Test Buffer Positive Output

analog out

44

FE_TESTN

Test Buffer Negative Output

analog out

45

FE_VSSA33T

Analog Ground Test Buffer

Vss

46

FE_VDDA18AD

Analog 1.8V ADC

Vdd

47

FE_VSSA18AD

Analog ground ADC

Vss

48

#nc

to be connected to ground on PCB

49

FFSR

Focusing actuator control signal output - PDM

bidir, 3.3V, 2mA

50

#nc

to be connected to ground on PCB

51

REFFSR

Clock (50% duty cycle) for Actuator PDM reference

bidir, 3.3V, 2mA

52

SPDL

Spindle motor control signal output - PDM

bidir, 3.3V, 2mA

53

SLED1

SLED motor control signal output1 (stepping/DC) - PDM

bidir, 3.3V, 2mA

54

SLED2

SLED motor control signal output2 (stepping) -PDM

bidir, 3.3V, 2mA

55

ICC1/GPB6

Serial interface TX or ST7 GPIO PB6

bidir, 3.3V, 2mA

56

ICC2/GPB7

Serial interface RX or ST7 GPIO PB7

bidir, 3.3V, 2mA

57

VDD_TOP

Core VDD 1.8V

Vdd

58

TFSR

Tracking actuator control signal output - PDM

bidir, 3.3V, 2mA

59

VSS_TOP

Core VSS Ground

Vss

60

VSSPAD1

Pad Ring ground

Vss

61

VDDPAD2

3.3V for Digital Pad Ring

Vdd

62

VDDPAD3

3.3V for Digital Pad Ring

Vdd

63

ICD_N

On-Chip-Emulator enable

in, 3.3V

64

DRD4/FLASH_OE

SDRAM Data 4 or FLASH Output Enable

bidir, 3.3V, 2mA

65

GPB0/CAV

ST7 GPIO PB0 or CAV feedback input

bidir, 3.3V, 2mA

66

GPA7

ST7 GPIO PA7 (external interrupt)

bidir, 3.3V, 2mA

67

GPA6

ST7 GPIO PA6

bidir, 3.3V, 2mA

Table 1.

Pin List- LQFP128 (continued)

N°

Name

Description

Pin Type