Datasheet SC16312 Datasheet (SILAN)

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1/4 to 1/11 DUTY FIP(VFD) CONTROLLER/DRIVER

DESCRIPTION

The SC16312 is a FIP (Fluorescent Indicator Panel, or Vacuum Fluorescent Display) controller/driver that is driven on a 1/4 or 1/11 duty factor. It consists of 11 segment output lines, 6 grid output lines, 5 segment/grid output drive lines, a displaymemory, a control circuit, and a key scan circuit. Serial data is input to the SC16312 through a three-line serial interface. This FIP controller/driver is ideal as a peripheral device for a single-chip microcomputer.

FEATURES

* Multiple display modes (11-segment & 11-dight

to 16-segment & 4-digit). * Key scanning (6x4 matrix). * Dimming circuit (eight steps). * High-voltage output (V * LED ports (4 chs., 20 mA max). * General-purpose input port (4 bits)

PAD CONFIGURATION

– 35V max).

DD

SW SW SW

SW

D

OUT

D

IN

V

SS

CLK STB

KEY KEY

4

3

2

1

LED

VSSOSC

44 43 42 41 40 39 38 37 36 35 34

1

2

3

4

4 5 6 7 8 9

10

1

2

11

12 13 14 15 16 17 18 19 20 21 22

4

KEY3KEY

DD

V

SC16312

1

2

KS

/

2/

1

Seg

3

KS

3/

Seg

4

KS

4/

Seg

5

KS

5/

Seg

SC16312

* No external resistors necessary for driver

outputs (P-ch open-drain + pull-down resistor output)

* Serial interface (CLK, STB, D

Grid4Grid3Grid2Grid1VDDLED

33

Grid

5

32

Grid

6

31

Seg16/Grid

30

Seg15/Grid

29

Seg14/Grid

28

Seg

13/

27

V

EE

Seg

12/

26 25

Seg

11

Seg

10

24 23

Seg

9

6

8

KS

Seg7Seg

6/

Seg



QPF-44-10x10-0.8

7

8

9

Grid

10

Grid

11

IN,DOUT

)

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BLOCK DIAGRAM

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SC16312

Command decoder

6

D

IN

5

D

OUT

CLK

STB

V

DD

Key

1

to Key

4

SW

1

to

4

SW

Serial I/F

8

9

R

44

OSC

4

4-bit latch

4

Display memeoy

16 bits x 11 words

Timing generator

key scan

key data memory(4 x 6)

4-bit latch

42 39 14 7 27

LED

1

Key datamemory(4 x 6)

4

Dimming

16-bit

output

latch

11-bit

shift

register

circuit

5

11 6

V

DD

(+5V)

selector

V

SS

(0V)

1116

Data

V

EE

(-30V)

segm-

ent

driver

Multip

lexed driver

5

Grid

driver

ABSOLUTE MAXIMUM RATING

(Ta=25°C, Vss=0V)

Characteristic Symbol Value Unit

Logic Supply Voltage V Driver Supply Voltage V Logic Input Voltage V FIP Driver Output Voltage V LED Driver Output Current I FIP Driver Output Current I PowerDissipation P Storage temperature T Operating Ambient Temperature T

DD

EE

I1

O2 O1 O2

D STG OPT

* Note: Derate at –6.4 mW/°C at Ta=25°C or higher

-0.5 ~ 7.0 V

V

0.5 ~ VDD-40 V

DD +

-0.5~VDD+0.5 V

VEE-0.5~VDD+0.5 V

+25 mA

-40 (grid) ; -15 (segment) mA

*

800

-65 ~ +150

-40~+85

15

Seg

1

25

Seg

11

Seg

12

/

Grid

Seg

Grid

11

16

/

Grid

7

6

26

31

27

32

mW

°C °C

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RECOMMENDED OPERATING RANGE

Parameter Symbol Min Typ Max Unit

Logic Supply Voltage V High-Level Input Voltage V Low-Level Input Voltage V Driver Supply Voltage V

Maximum power consumption P

Where segment current = 3mA, grid current = 15mA, and LED current = 20mA, FIP driver dissipation = number of segments x 6 + number of grids/(number of grids + 1) x 30(mW)

R

dissipation = (VDD-VEE)2/50 x (number of segments + 1)(mW)

L

LED driver dissipation = number of LEDs x 20(mW) Dynamic power consumption = V

Example Where V

= -25V, VDD= 5V, and in 16-segment and 6-digit modes,

EE

FIP driver dissipation = 16 x 6 +6/7 x 30 = 122 R

dissipation = 302/50 x 17 = 306

L

LED driver dissipation = 4 x 20 = 80 Dynamic power consumption = 5 x 5 = 25

= FIP driver dissipation + RLdissipation + LED driver dissipation + dynamic

MAX.

power consumption

x5(mW)

DD

Total 553 Mw

(Ta=-20 ~ 70 °C, Vss=0V)

DD

IH

IL

EE

4.555.5V

0.7x V

DD

0--0.3xVDDV 0--V

SC16312

-- V

DD

-35 V

DD

V

ELECTRICAL CHARACTERISTICS

Parameter Symbol Test conditions Min Typ Max Unit

High-Level Output Voltage V Low -Level Output Voltage V Low -Level Output Voltage V High-Level Output Current I

High-Level Output Current I

Driver Leakage Current I Output Pull-Down Resistor R Input Current I High-Level Input Voltage V Low-Level Input Voltage V Hysteresis voltage V Dynamic Current Consumption I

OH1 OL1 OL2

OH21

OH22

OLEAKVO=VDD

L I IH IL

H

DDdyn

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(Ta=-20 ~ 70 °C, V

LED1-LED4,I LED1-LED4,I D

I

,

OUT

OL2

V

VDD-2V, Seg1to Seg

=

O

V

VDD-2V, Grid1to Grid

=

O

DD

OH1= OL1 =20

=4mA -- -- 0.4 V

Seg12/Grid11to Seg16/Grid

=4.5 ~ 5.5V, VEE=-30V)

-1mA 0.9V

DD

mA -- -- 1 V

-3 -- -- mA

11

6

-15 -- -- mA

7



-- -- V

-35V,driver off -- -- -10 Driver output 50 100 150 VI=V

V

or

DD

SS

-- 0.7V

-- --

DD

±1 µA

-- -- V

-- -- -- 0.3V CLK, DIN, STB -- 0.35 -- V Under no load, display off -- -- 5 mA

Rev: 1.0 2000.12.31

3

µA kΩ

V

DD

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SWITCHING CHARACTERISTICS

Parameter Symbol Test conditions Min Typ Max Unit

Oscillation Frequency t

Propagation Delay Time

Rise Time

Fall Time t Maximum Clock Frequency f Input Capacitance C

SWITCHING CHARACTERISTIC WAVEFORMS

f

OSC

50%



(Ta=-20 ~ 70 °C, V

OSC

t

PLZ

t

PZL

t

TZH1

t

TZH2

THZ

max.

I

R=51Ω CLKD

OUT

CL=15pF, RL=10kΩ

CL=300pF

CL=300pF, Segn,Grid Duty=50% 1 -- -- MHz

-- -- -- 15 pF

=4.5 ~ 5.5V, VEE=-30V)

DD

Seg1to Seg Grid

Seg to Seg16/Grid

to Grid6,

1

/Grid

12

n

11

7

SC16312

350 500 650 kHz

-- -- 300 ns

-- -- 100 ns

-- -- 2

-- -- 0.5

-- -- 120

PW

STB

µs

STB

PW

CLK

PW

CLK

D

Sn/G

IN

OUT

CLK

t

SETUP

n

90%

10%

t

HOLD

t

THZ

t

PZL

t

CLK-STB

t

PZL

t

THZ

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TIMING CONDITIONS

Parameter Symbol Test conditions Min Typ Max Unit

Clock Pulse Width PW Strobe Pulse Width PW Data Setup Time t Data Hold Time t Clock-Strobe Time t WaitTime t

Note: When data is read, a wait time t

command, until the falling of the first clock that has read the data.

PAD DESCRIPTION

Pin No. Symbol Pin Name Description

6D

5D

9 STB Strobe

8 CLK Clock input

44 OSC Oscillator pin

15 ~ 20

21 ~ 25 Seg7to Seg

37 ~ 32 Grid1to Grid

IN

OUT

/KS

Seg

1

to Seg6/KS



(Ta=-20 ~ 70 °C, V

1

6

11

6



=4.5 ~ 5.5V)

DD

CLK STB

SETUP

HOLD

CLK-STB

WAT CLK ↑→CLK ↓

of 1 µs is necessary since the rising of the eighth clock that has set the

WAIT

Data input

Data output

High-voltage output Segment output pins (Dual function as key source).

High-voltage output (segment) High-voltage output (grid)

Input serial data at rising edge of shift clock, starting from the low order bit. Output serial data at the falling edge of the shift clock, starting from low order bit. This is N-ch open-drain output pin. Initializes serial interface at the rising or falling edge of the SC16312. It then waits for reception of a command. Data input after STB has fallen is processed as a command. While command data is processed, current processing is stopped, and the serial interface is initialized. While STB is high, CLK is ignored. Reads serial data at the rising edge, and outputs data at the falling edge. Connect resistor to this pin to determine the oscillation frequency to this pin.

Segment output pins.

Grid output pins.

-- 400 -- -- ns

-- 1 -- --

-- 100 -- -- ns

CLK ↑→STB ↑

Note

SC16312

1---1----

(to be continued)

µs

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(continued)

Pin No. Symbol Pin Name Description

26,28 ~ 31

/Grid

Seg

12

to Seg16/Grid

High-voltage output

11

(segment/grid)

7

These pins are selectable for segment or grid driving.

42 ~ 39 LED1to LED4LED output CMOSoutput. +20mA max.

10 ~ 13 KEY1to KEY4Key data input

1~4 SW1to SW

14,38 V

7,43 V

27 V

DD SS EE

Switch input These pins constitute a 4-bit general-purpose input port.

4

Logic power Logic ground Connect this pin to system GND. Pull-down level VDD-35V max.

Data input to these pins is latched at the end of the display cycle.

5V±10%

FUNCTIONAL DESCRIPTION

1. DISPLAY RAM ADDRESS AND DISPLAY MODE

The display RAM stores the data transmitted from an external device to theSC16312 through the serial interface,

and is assigned addresses as follows, in 8 bits unit:

SC16312

Seg

b

00H 02H 04H 06H 08H 0AH 0CH 0EH 10H 12H 14H

0

1

xxH

Seg

L L L L L

L L

L L L L

b3b

L

4

00H 02H 04H 06H 08H 0AH 0CH 0EH 10H 12H 14H

4

U U U U U

U U U

xxH

Seg

U U U

U

Seg

8

b

7

01H 03H 05H 07H 09H 0BH 0DH 0FH 11H 13H 15H

12 L L L L L L

L L L L L

01H 03H 05H 07H 09H 0BH 0DH 0FH 11H 13H 15H

Seg

16 U U U U U U

U U U U U

DIG DIG DIG DIG DIG DIG DIG DIG DIG DIG DIG

1 2 3 4 5 6 7 8 9 10 11

Lower 4 bits Higher 4 bits

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2. KEY MATRIX AND KEY-INPUT DATA STORAGE RAM

The key matrix is made up of a 6 x 4 matrix, as shownbelow.

KEY

1

KEY

2

KEY

3

KEY

4

1

2

3

4

5

KS

/

1/

2

Seg

KS

3/

4/

Seg

The data of each key is stored as illustrated below, and is read with the read command, starting from the least

significant bit.

6

KS

/

5/

6

Seg

SC16312

KEY

KEY4KEY1…KEY

1…

Seg

/KS

1

Seg3/KS Seg5/KS

Seg2/KS

1

Seg4/KS

3

Seg6/KS

5

b0--------- b3b4--------- b

4 2 4

Reading sequence

6

7

3. LED PORT

Data is written to the LED port with command, starting from the least port’s least significant bit. When a bit of this

port is 0, the corresponding LED lights; When the bit is 1, the LED turns off. The data ofbits 5 through 8 are ignored.

MSB

b3 b2 b1 b0

Don't care

LSB

LED1 LED2 LED3 LED4

On power application, all LEDs are unlit.

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4. SW DATA

SW data is readwith the read command, starting from the least significant bit. Bits 5 through8 of the SW data are 0.

SC16312

MSB

0000

5. COMMANDS

Commands set the display mode and status of the FIP driver. The first 1 byte input to the SC16312 through the D If STB is set high while comma nds/ data are tr ansmit ted, s eria l commun icat ion is init ia li zed, and th e

commands/data being transmitted are invalid(however, the commands/data previously transmitted remain valid).

(1) Display mode setting commands

These commands initialize the SC16312 and select the number of segments and the number of grid(1/4 to 1/11 duty, 11 segments to 16 segments). When these commands are executed, the display is forcibly turned off, and key scanning is also stopped. To resume display, the display command“ON” must be executed. If the same mode is selected,however, nothing happens.

MSB LSB

00

b3 b2 b1 b0

pin after the STB pin has fallen is regarded as a command.

IN

b2 b1 b0

LSB

SW1 SW2 SW3 SW4

Irrelevant

On power application, the 11-digit, 11-segment mode is selected.

Display mode settings 000: 4 digits, 16 segments 001: 5 digits, 16 segments

010: 6 digits, 16 segments 011: 7 digits, 15 segments 100: 8 digits, 14 segments 101: 9 digits, 13 segments

110: 10 digits, 12 segments 111: 11 digits, 11 segments

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(2) Data setting commands

These commands set data write and data read modes.

MSB LSB

01



b3

b2 b1

SC16312

b0

Irrelevant

Data write and read mode settings 00: Write data to display memory 01: Write data to LED port 10: Read key data

11: Read SW data Address increment modesettings

(display memory) 0: Increments address after data

has been written

1: Fixes address

Test mode settings

0: Normal operation

1: Test mode

On power application, the normal operation and address increment modes are set.

(3) Address setting commands

These commands set an address of the display memory.

MSB LSB

b411

b2

b3

b1 b0

Address (00H-15H)

If address 16H or higher is set, data is ignored, until a valid address is set. On the power application, the address is set to 00H.

(4) Display control commands

MSB LSB

10

b3

b2 b1 b0

Irrelevant

Dimmingquantity settings

000: Set pulse width to 1/16

001: Set pulse width to 2/16

010: Set pulse width to 4/16 011: Set pulse width to 10/16 100: Set pulse width to 11/16 101: Set pulse width to 12/16 110: Set pulse width to 13/16 111: Set pulse width to 14/16

Turns on/off display

0: Display off(keyscan

continues)*

1: Display on

On power application, the 1/6 pulse width is set and the display is turned off.

*Note: On powerapplication, key scanning is stopped.

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KEY SCANNING ANG DISPLAY TIMING

T

DISP

=500µs



SC16312

Key scan data

SEG output

G

1

2

G

3

Gn

T

1/16

DISP

1frame=T

DISP

x(n+1)

123456

One cycle of key scanning consists of one frame, and data in a 6x4 matrix is stored in RAM.

SERIAL COMMUNICATION FORMAT

Reception(command/data write)

STB

D

IN

CLK

b0

1

b1 b2 b6 b7

23 78

DIG1DIGnDIG2 DIG3DIG1

If data continues

Transmission(data read)

STB

IN

CLK

D

OUT

Because the D

pin is an N-ch, open-drain output pin, be sure to connect an external pull-up resistor to this

OUT

pin(1kΩ to 10kΩ)..

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b7b6b5b4b3b2b1b0D

12345612345678

Note

t

WAIT

b0 b1 b2 b3 b4 b5

A dataread commandis set. Data is read.

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APPLICATION

Updating display memory by incrementing address

STB

CLK



SC16312

D

IN

Command1: sets display mode Command2: sets data Command3: sets address Data 1 to n: transfers display data(22 bytes max.) Command4: controls display

Updating specific address

STB

CLK

D

IN

Command1: set data Command2: sets address Data: display data

Data

Command 4Data nData 1Command 3Command 2Command 1

CommandCommand 2Command 1

Data

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PACKAGE OUTLINE

QFP-44-10x10-0.8 UNIT:mm

SC16312

13.6+-0.4

10.0+-0.2

33 23

34

1.0 1

0.35+-0.10 0.8

1.8+-0.2

22

10.0+-0.2

13.6+-0.4

1244

11

0.8+-0.2

2.7

0.15+-0.05



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Datasheet SC16312 Datasheet (SILAN)

Specifications and Main Features

Frequently Asked Questions

User Manual