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AD6315 PDF 데이터시트 ( Data , Function )

부품번호 AD6315 기능
기능 1/4- to 1/12 Duty VFD Controller/Driver
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AD6315 데이터시트, 핀배열, 회로
1/4- to 1/12 Duty VFD Controller/Driver
AD6315
Features
- Multiple display modes
(16-segment & 12-digit to 24-segment & 4-digit)
- Key scanning (16 x 2 matrix)
- Dimming circuit (eight steps)
- High-voltage output ( VEE (max) = VDD – 35V )
- 4 channel LED ports
- No external resistors necessary for driver outputs
(P-ch open-drain + pull-down resistor output)
- Serial interface (CLK, STB, DIN, DOUT)
- Package: 44-pin plastic QFP and LQFP
General Description
The AD6315 is a VFD (Vacuum Fluorescent Display
or fluorescent Indicator Panel) driver that is driven
on a 1/4- to 1/12- duty factor. It consists of 16
segments and 4 grids output lines, 8 segments /
grid output driving lines, a display memory, a control
circuit, and a key scan circuit. Serial data is input to
the AD6315 through a 3-wire serial interface. This
VFD driver is ideal as a peripheral device for a
single-chip microcomputer.
Pin Assignments
Seg20/Grid9
Seg21/Grid8
Seg22/Grid7
Seg23/Grid6
Seg24/Grid5
Grid4
Grid3
Grid2
Grid1
VDD
VSS
Seg9/KS9
Seg8/KS8
Seg7/KS7
Seg6/KS6
Seg5/KS5
Seg4/KS4
Seg3/KS3
Seg2/KS2
Seg1/KS1
VDD
VSS
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. A5 Dec 29, 2003
1/16




AD6315 pdf, 반도체, 판매, 대치품
1/4- to 1/12 Duty VFD Controller/Driver
AD6315
Absolute Maximum Ratings (TA = 25°C,VSS = 0V)
Parameter
Logic supply voltage
Driver supply voltage
Logic input voltage
VFD driver output voltage
LED driver output current
VFD driver output current
Power dissipation
Operating ambient temperature
Storage temperature
Symbol
VDD
VEE
VI1
VO2
IO1
IO2
PD
TA
Tstg
Rating
-0.5 to +6.0
VDD + 0.5 to VDD – 40
- 0.5 to VDD + 0.5
VEE - 0.5 to VDD + 0.5
15
-40 (grid)
-15 (segment)
800 (Note)
-25 to +85
-50 to +150
Unit
V
V
V
V
mA
mA
mW
°C
°C
Note : Derate at –6.4W/°C at TA = 25°C or higher.
Caution : If the absolute maximum rating of even one of the above parameters is exceeded even momentarily, the quality of the
product may be degraded. Absolute maximum ratings, therefore, specify the values exceeding which the product may
be physically damaged. Be sure to use the product within the range of the absolute maximum ratings.
Recommended Operating Range (TA = -20 to 70°C, VSS = 0V)
Parameter
Logic supply voltage
High-level input voltage
Low-level input voltage
Driver supply voltage
Symbol
VDD
VIH
VIL
VEE
Min.
4.5
0.7 VDD
0
0
Typ.
5
Max.
5.5
VDD
0.3 VDD
VDD-35
Remark :
Maximum power consumption
Pmax = VFD driver dissipation + RL dissipation + LED driver dissipation + dynamic power consumption
Where
segment current = 3mA, grid current = 15mA, and LED current = 20mA
VFD driver dissipation = number of segments x 6 + number of grids/(number of grids + 1) x 30(mW)
RL dissipation (VDD - VEE)2 / 50 x (number of segments + 1 ) (mW)
LED driver dissipation = number of LEDs x 20 (mW)
Dynamic power consumption = VDD x 5 (mW)
Unit
V
V
V
V
Anachip Corp.
www.anachip.com.tw
4/16
Rev. A5 Dec 29, 2003

4페이지










AD6315 전자부품, 판매, 대치품
1/4- to 1/12 Duty VFD Controller/Driver
(2) Key Matrix and Key-input Data Storage RAM
The key matrix is made up of a 16 X 2 matrix, as shown below.
KEY1
KEY2
AD6315
The data of each key is stored as follows, and is read with the read command starting from the least
significant bit.
KEY1 KEY2
Seg1 / KS1
Seg5 / KS5
Seg9 / KS9
Seg13 / KS13
b0 b1
KEY1 KEY2
Seg2 / KS2
Seg6 / KS6
Seg10 / KS10
Seg14 / KS14
b2 b3
KEY1 KEY2
Seg3 / KS3
Seg7 / KS7
Seg11 / KS11
Seg15 / KS15
b4 b5
KEY1 KEY2
Seg4 / KS4
Seg8 / KS8
Seg12 / KS12
Seg16 / KS16
b6 b7
Reading
Sequence
(3) LED Port
Data is written to the LED port with the write command, starting from the least significant bit. “L” output
when the bit of this port is 0, and “H” output when the bit is 1. The data of bits after the 5th bit are ignored.
MSB
LSB
b3 b2 b1 b0
Don't care
LED1
LED2
LED3
LED4
Note: On power application, all the LED ports are “L” output.
(4) Commands
Commands set the display mode and status of the VFD driver.
The first 1 byte input to the AD6315 through the DIN pin after the STB pin has fallen is regarded as a
command. If STB is set high while commands/data are transmitted, serial communication is initialized,
and the commands/data being transmitted are invalid (however, the commands/data previously
transmitted remain valid).
Anachip Corp.
www.anachip.com.tw
7/16
Rev. A5 Dec 29, 2003

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