AS1115 DB-YELLOW austriamicrosystems, AS1115 DB-YELLOW Datasheet - Page 17

• Manufacturer Part Number: AS1115 DB-YELLOW
• Description: BOARD DEMO AS1115 YELLOW
• Manufacturer: austriamicrosystems

Specifications of AS1115 DB-YELLOW

• Current - Output / Channel: *
• Outputs And Type: 8, Non-Isolated
• Voltage - Output: *
• Features: 64 LED + 16 keys, I⊃2C
• Voltage - Input: 2.7 ~ 5.5 V
• Utilized Ic / Part: AS1115
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

Table 17. Intensity Register Format
AS1115
Datasheet - D e t a i l e d D e s c r i p t i o n
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 15/16
down to 1/16 of the peak current set by R
Table 18. Intensity Register Address
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 700Hz. If the number of digits displayed is reduced, the update frequency is increased.
The frequency can be calculated using 10 x fOSC/(N+2), where N is the number of digits.
Note: To avoid differences in brightness this register should not be used to blank parts of the display (leading zeros).
Table 19. Scan-Limit Register Format (Address (HEX) = 0x0B))
www.austriamicrosystems.com/LED-Driver-ICs/AS1115
1/16 (min on)
Register HEX Address
Duty Cycle
Display digit 0 only
2/16
3/16
4/16
5/16
6/16
7/16
8/16
Display digits 0:1
Display digits 0:2
Display digits 0:3
Scan Limit
0x0A
0x10
0x11
0x12
0x13
HEX Code
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
Code
0xX0
0xX1
0xX2
0xX3
HEX
MSB
0
0
0
0
0
0
0
0
D7:D3 D2
Global
Register Data
Type
Digit
Digit
Digit
Digit
X
X
X
X
D2
0
0
0
0
1
1
1
1
Register Data
SET
.
0
0
0
0
D1
0
0
1
1
0
0
1
1
D1
0
0
1
1
LSB
0
1
0
1
0
1
0
1
Revision 1.07
D0
0
1
0
1
15/16 (max on)
Digit 1 Intensity
Digit 3 Intensity
Digit 5 Intensity
Digit 7 Intensity
Duty Cycle
10/16
12/16
13/16
14/16
15/16
11/16
Display digits 0:4
Display digits 0:5
Display digits 0:6
Display digits 0:7
9/16
D7:D4
Scan Limit
X
HEX Code
Register Data
0xXA
0xXB
0xXC
0xXD
0xXE
0xX8
0xX9
0xXF
Code
0xX4
0xX5
0xX6
0xX7
HEX
MSB
1
1
1
1
1
1
1
1
Global Intensity
Digit 0 Intensity
Digit 2 Intensity
Digit 4 Intensity
Digit 6 Intensity
D7:D3 D2 D1 D0
Register Data
X
X
X
X
D3:D0
Register Data
D2
0
0
0
0
1
1
1
1
1
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
17 - 24
LSB
0
1
0
1
0
1
0
1
0
1
0
1