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69

Pin No.

Terminal Name

I/O Setting

Contents of Control

Remark

1

NC

-

No internal connection

 

2

SW

O

Switching Node

 

3

BST

I

Boost pin for bootstrap capacitor

 

4

ISEN

I

Current sense

 

5

SGND

-

Sense Ground

 

6

RTN

I

Circuit Ground

 

7

NC

-

No internal connection

 

8

NC

-

No internal connection

 

9

FB

I

Feedback input from the regulated output

 

10

SS

I

Soft start

 

11

RON/SD

I

On-time control and shutdown

 

12

VCC

-

Output from the startup regulator

 

13

VIN

-

Input supply voltage

 

14

NC

-

No internal connection

 

70

Pin No.

Terminal Name

I/O Setting

Contents of Control

Remark

1

NC

-

No Internal Connection

 

2

R class

I

Class Select Input

 

3

NC

-

No Internal Connection

 

4

Vin

I

Power Input. Tie to system -48V through the input diode
bridge.

 

5

Vout

O

Power Output. Supplies -48V to the PD load through an
internal power MOSFET that limits input current.VOUT is
high impedance until the input voltage rises above the turn-
on UVLO threshold. The output is then current limited. See
Applications Information.

 

6

nPWRGD

O

Power Good Output , Open-Drain.Signals to the PD load
that the LTC4257-1 MOSFET is on and that the PD.s DC/DC
converter can start operation. Low impedance indicates
power is good. PWRGD is high impedance during detection,
classification and in the event of a thermal overload.
PWRGD is referenced to VIN.

 

7

NC

-

No Internal Connection.

 

8

GND

-

Digital  GND

 

71

Pin No.

Terminal Name

I/O Setting

Contents of Control

Remark

1

X1

I

Not in use

Connecting to Vcc

2

X2

O

OPEN

3

Vss

-

DG

4

OSC2

O

9.830MHz ceralock

5

OSC1

I

9.830MHz ceralock

6

TEST

I

Not in use

Connecting to GND

7

Vcc

- Power 

terminal

+3.3V

8

nReset

I

Receive from IC1 (RESET)

Low active

9

P20/IRQ4/ADTAG

O

Transmit to Bluetooth Module(UART_CTS)

10

P21/SCK1

I

Receive from IC1 (SCLK_SUB)

11

P22/SI1

I

Receive from IC1 (TXD)

12

P23/SO1

O

Transmit to IC1 (RXD_SUB)

13

P24/SCK3

I

Not in use

Connecting to GND

14

P25/RxD

I

Receive from Bluetooth Module(UART_TX)

15

P26/TxD

O

Transmit to Bluetooth Module(UART_RX)

16

P27/IRQ0

I

DC_Alarm input

Low active

17

P17/IRQ3/TMIF

I

Receive from Bluetooth Module(UART_RTS)

18

P16/IRQ2

O

Connect to Bluetooth Module(PIO2)

19

P15/IRQ1

I

Connect to Bluetooth Module(PIO3)

20

P14

O

Connect to Bluetooth Module(PIO1)

21

P13/TMIG

I

Connect to Bluetooth Module(PIO0)

22

P12/TMOFH

O

Transmit to Blue tooth Module(RESET)

Low active

23

P11/TMOFL

I

KEYIN[8]

Low:push

24

P10/TMOW

O

Connect to IC19

25

PA3

I

KEYIN[7]

Low:push

26

PA2

I

KEYIN[6]

Low:push

27

PA1

I

KEYIN[5]

Low:push

28

P50/WKP0

I

KEYIN[4]

Low:push

29

P51/WKP1

I

KEYIN[3]

Low:push

30

P52/WKP2

I

KEYIN[2]

Low:push

31

P53/WKP3

I

KEYIN[1]

Low:push

32

P54/WKP4

I

Mode Select-1

Connecting 33k

Ω to GND

33

P55/WKP5

I

Mode Select-2

Connecting 33k

Ω to GND

34

P56/WKP6

O

KEYOUT1

35

P57/WKP7

I

KEY_HOOK

Low:OFF-HOOK, Hi:ON-HOOK

36

P60

O

C_LED1

Low:active

37

P61

O

C_LED2

Low:active

38

P62

O

C_LED3

Low:active

39

P63

O

C_LED4

Low:active

40

P64

O

C_LED5

Low:active

72

41

P65

O

C_LED6

Low:active

42

P66

O

C_LED7

Low:active

43

P67

O

C_LED8

Low:active

44

P70

O

C_LED9

Low:active

45

P71

O

C_LED10

Low:active

46

P72

O

R_LED1

Hi:active

47

P73

O

R_LED2

Hi:active

48

P74

O

R_LED3

Hi:active

49

P75

O

R_LED4

Hi:active

50

P76

O

R_LED5

Hi:active

51

P77

O

R_LED6

Hi:active

52

P80

O

BK_LIT

Hi:active

53

P81

I

Connecting to IC4(state of IC5)

54

P82

O

LCD_DATA

55

P83

O

LCD_SCK

56

P84

I/O

LCD_A0/LCD_MODEL

57

P85

O

LCD_RES

Low active

58

P86

O

LCD_CS

59

P87

I

Judgement of Self-labeling

60

TONED

O

Not in use

OPEN

61

VTref

I

Not in use

Connecting to Vcc

62

PB7/AN7

I

KEY_S1 and KEY_S2

63

PB6/AN6

I

KEY_S3 and KEY_S4

64

CVcc

I

Internal electrical power source

Connecting 0.1

µF to GND

Pin No.

Terminal Name

I/O Setting

Contents of Control

Remark