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PDF AS1107 Data sheet ( Hoja de datos )
| Número de pieza | AS1107 | |
| Descripción | (AS1106 / AS1107) 8-Digit LED Display Drivers | |
| Fabricantes | AMSCO | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS1107 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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austriamicrosystems
AS1106, AS1107
8-Digit LED Display Drivers
Data Sheet
1 General Description
2 Key Features
The AS1106 and the AS1107 are compact display driv-
! 10MHz SPI-, QSPI-, Microwire-Compatible
ers for 7-segment numeric displays of up to 8 digits. The
Serial I/O
devices can be programmed via SPI, QSPI, and Microw-
! Individual LED Segment Control
ire as well as a conventional 4-wire serial interface.
! Segment Blinking Control (can be synchronized
The devices include an integrated BCD code-B/HEX
across multiple drivers)
decoder, multiplex scan circuitry, segment and display
! Hexadecimal- or BCD-Code/No-Decode Digit
drivers, and a 64-bit memory. Internal memory stores
Selection
the LED settings, eliminating the need for continuous
! 3µA Low-Power Shutdown Current (typ; data
device reprogramming.
retained)
Every segment can be individually addressed and
updated separately. Only one external resistor (RSET) is
required to set the current through the LED display. LED
brightness can be controlled by analog or digital means.
The devices can be programmed to use the internal
! Extremely Low Operating Current 0.5mA in Open-
Loop
! Digital and Analog Brightness Control
! Display Blanked on Power-Up
! Drive Common-Cathode LED Displays
code-B/HEX decoder to display numeric digits or to
! Low-EMI Low Slew-Rate Limited Segment
directly address each segment.
Drivers (AS1107)
The AS1106 and the AS1107 feature an extremely low
shutdown current of typically 3µA, and an operational
current of less than 500µA. The number of digits can be
programmed, the devices can be reset by software, and
! Supply Voltage Range: 2.7 to 5.5V
! Software Reset
! Optional External Clock
! Packages:
an external clock is also supported. Additionally, sDeagt-aSheet4U.c-o2m4-pin DIP
ment blinking can be synchronized across multiple driv-
- 24-pin SOIC
ers.
Several test modes are available for easy application
3 Applications
debugging.
The devices are available in 24-pin DIP and 24-pin
SOIC packages.
The AS1106 and AS1107 are ideal for bar-graph dis-
plays, instrument-panel meters, LED matrix displays, dot
matrix displays, set-top boxes, white goods, professional
audio equipment, medical equipment, industrial control-
Figure 1. Typical Application Diagram
lers and panel meters.
DataShee
DataSheet4U.com
9.53kΩ
ISET
DIN
I/O
I/O LOAD/CSN
SCK
CLK
Micro-
processor
GND
+5V
VDD
AS1106/
AS1107
DIG0 to
DIG7
8 Digits
8 Segments
SEG A to G
SEP DP
GND
8-Digit Microprocessor Display
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AS1106, AS1107
Data Sheet
austriamicrosystems
6 Typical Operating Characteristics
VDD = 5V, RSET = 9.53kΩ, TAMB = 25ºC (unless otherwise specified).
Figure 2. Scan Frequency vs.Temperature
Figure 3. Scan Frequency vs. VDD
990 980
980 970
960
970
950
960 940
950 930
920
940
910
930
-40 -20 0 20 40 60 80
TAMB [°C]
900
2
34
VDD (V)
5
6
et4U.com
Figure 4. ISEG vs. Temperature
50
45 VDD = 5V, VOUT = 2.4V
40
VDD = 5V, VOUT = 4V
35
30
25
20 VDD = 2.7V, VOUT = 2V
15
10 VDD = 2.7V, VOUT = 2.4V
5
0
-40
-20
0 20 40
TAMB (°C)
60
Figure 5. ISEG vs. VDD
60
50
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30
20
10
VOUT = 1.7V
VOUT = 4V
VOUT = 2.4V
0
80 2 2.5 3 3.5 4 4.5 5 5.5 6
VDD (V)
Figure 6. AS1106 Segment Output Current
Intensity = 31/32 (0Fh)
50
45
40
35
30
25
20
15
10
5
0
0.0
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0
DataSheet4U.com
Time (µs)
Figure 7. AS1107 Segment Output Current
Intensity = 15/16 (0Fh)
50
45
40
35
30
25
20
15
10
5
0
0.0
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0
Time (µs)
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AS1106, AS1107
Data Sheet
austriamicrosystems
Digit- and Control-Registers
et4U.com
Intensity Control Register (0xXA)
The brightness of the display can be controlled by digital means using the Intensity Control Register and by analog
means using RSET (see Selecting RSET Resistor Value and Using External Drivers on page 13).
Display brightness is controlled by an integrated pulse-width modulator which is controlled by the lower-nibble of the
Intensity Control Register. The modulator scales the average segment-current in 16 steps from a maximum of 31/32
down to 1/32 (15/16 to 1/16 for the AS1107) of the peak current set by RSET.
Table 13. Intensity Register Format (Address (HEX) = 0xXA))
Duty Cycle
AS1106
AS1107
HEX Code
Register Data
D7 D6 D5 D4 D3 D2 D1 D0
1/32 (min on) 1/16 (min on)
0xX0
XXXX0 0 0 0
3/32 2/16
0xX1
XXXX0 0 0 1
5/32 3/16
0xX2
XXXX0 0 1 0
7/32 4/16
0xX3
XXXX0 0 1 1
9/32 5/16
0xX4
XXXX0 1 0 0
11/32
6/16
0xX5
XXXX0 1 0 1
13/32
7/16
0xX6
XXXX0 1 1 0
15/32
8/16
0xX7
XXXX0 1 1 1
17/32
9/16
0xX8
XXXX1 0 0 0
19/32
10/16
0xX9
XXXX1 0 0 1
21/32
11/16
0xXA
XXXX1 0 1 0
23/32
12/16
0xXB
XXXX1 0 1 1
25/32
13/16
0xXC
XXXX1 1 0 0
27/32
14/16
0xXD
XXXX1 1 0 1
29/32
15/16
0xXE
XXXX1 1 1 0
31/32 (max on) 15/16 (max on)
0xXF DataShXeet4U.cXom X X 1 1 1 1
Scan-Limit Register (0x0B)
The Scan-Limit Register controls which of the digits are to be displayed. When all 8 digits are to be displayed, the
update frequency is typically 800Hz. If the number of digits displayed is reduced, the update frequency is increased.
The frequency can be calculated using 8fOSC/N, where N is the number of digits. Since the number of displayed digits
influences the brightness, RSET should be adjusted accordingly. Table 15 lists the maximum allowed current when
fewer than 4 digits are used.
Note: To avoid differences in brightness this register should not be used to blank parts of the display (leading zeros).
Table 14. Scan-Limit Register Format (Address (HEX) = 0xXB))
Scan Limit
HEX Code
D7
D6
Register Data
D5 D4 D3 D2
D1
D0
Display digit 0 only (see Table 15)
0xX0
XXXXX0 0 0
Display digits 0:1 (see Table 15)
0xX1
XXXXX0 0 1
Display digits 0:2 (see Table 15)
0xX2
XXXXX0 1 0
Display digits 0:3
0xX3
XXXXX0 1 1
Display digits 0:4
0xX4
XXXXX1 0 0
Display digits 0:5
0xX5
XXXXX1 0 1
Display digits 0:6
0xX6
XXXXX1 1 0
Display digits 0:7
0xX7
XXXXX1 1 1
Table 15. Maximum Segment Current for 1-, 2-, or 3-Digit Displays
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Number of Digits Displayed
1
2
3
Maximum Segment Current (mA)
10
20
30
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| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AS1107.PDF ] | |
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