AS1106PL austriamicrosystems, AS1106PL Datasheet - Page 12

• Manufacturer Part Number: AS1106PL
• Description: IC LED 8-DIGIT DRIVER 24-PDIP
• Manufacturer: austriamicrosystems

Specifications of AS1106PL

• Display Type: LED
• Configuration: 7 Segment + DP
• Interface: Serial
• Digits Or Characters: 8 Digits
• Current - Supply: 330mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
8.5.4 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 R
Selecting RSET Resistor Value and Using External Drivers on page
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 R
8.5.5 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, R
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 15. Scan-Limit Register Format (Address (HEX) = 0xXB))
Table 16. Maximum Segment Current for 1-, 2-, or 3-Digit Displays
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07
Table 14. Intensity Register Format (Address (HEX) = 0xXA))
31/32 (max on)
1/32 (min on)
Display digit 0 only (see
Display digits 0:1 (see
Display digits 0:2 (see
AS1106
13/32
15/32
17/32
19/32
21/32
23/32
25/32
27/32
29/32
11/32
3/32
5/32
7/32
9/32
Number of Digits Displayed
Display digits 0:3
Display digits 0:4
Display digits 0:5
Display digits 0:6
Display digits 0:7
Duty Cycle
Scan Limit
SET
1
2
3
15/16 (max on)
1/16 (min on)
.
AS1107
10/16
11/16
12/16
13/16
14/16
15/16
Table
Table
2/16
3/16
4/16
5/16
6/16
7/16
8/16
9/16
Table
16)
16)
16)
HEX Code
HEX Code
0xXA
0xXB
0xXC
0xXD
0xXE
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
0xX8
0xX9
0xXF
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
Maximum Segment Current (mA)
Revision 2.28
D7
14).
D7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
10
20
30
D6
D6
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D5
D5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SET
should be adjusted accordingly.
Register Data
Register Data
D4
D4
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D3
D3
X
X
X
X
X
X
X
X
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D2
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 16
D1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SET
(see
lists the
12 - 21
D0
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1