AS1100PE austriamicrosystems, AS1100PE Datasheet - Page 10

• Manufacturer Part Number: AS1100PE
• Description: IC LED 8-DIGIT DRIVER 24-PDIP
• Manufacturer: austriamicrosystems

Specifications of AS1100PE

• Display Type: LED
• Configuration: 7 Segment + DP
• Interface: Serial
• Digits Or Characters: 8 Digits
• Current - Supply: 330mA
• Voltage - Supply: 4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS1100
Datasheet - D e t a i l e d D e s c r i p t i o n
8.8 Display Test Register
With the display test register 0Fh all LED can be tested. In the test mode all LEDs are switched on at maximum brightness (duty cycle 31/32). All
programming of digit and control registers are maintained. The format of the register is given in
Table 12. Maximum Segment Current for 1-, 2-, or 3-digit Displays
Table 13. Display-test Register Format (address (hex) = 0xXF)
Note: The AS1100 remains in display-test mode until the display-test register is reconfigured for normal operation.
8.9 No-Op Register (Cascading of AS1100)
The no-operation register 00h is used when AS1100s are cascaded in order to support more than 8 digit displays. The cascading must be done
in a way that all DOUT are connected to DINof the following AS1100. The LOAD and CLK signals are connected to all devices. For a write
operation for example to the fifth device the command must be followed by four no-operation commands. When the LOAD signal finally goes to
high all shift registers are latched. The first four devices have got no-operation commands and only the fifth device sees the intended command
and updates its register.
8.10 Reset and External Clock Register
This register is addressed via the serial interface. It allows to switch the device to external clock mode (If D0=1 the CLK pin of the serial interface
operates as system clock input.) and to apply an external reset (D1). This brings all registers (except reg. E) to default state. For standard
operation the register contents should be "00h".
Table 14. Reset and External Clock Register (address (hex) = oxXE)
www.austriamicrosystems.com/LED-Driver-ICs/AS1100
Normal Operation,
Normal Operation,
external clock
external clock
Display Test Mode
internal clock
internal clock
Normal Operation
Reset state,
Reset state,
Mode
Mode
Number of digits Displayed
1
2
3
code (Hex)
Address
0xXE
0xXE
0xXE
0xXE
D7
X
X
D7
X
X
X
X
D6
X
X
Revision 1.36
D6
X
X
X
X
D5
X
X
D5
X
X
X
X
D4
Register Data
X
X
Maximum Segment Current (mA)
Register Data
D4
X
X
X
X
Table
D3
X
X
13.
D3
X
X
X
X
10
20
30
D2
X
X
D2
X
X
X
X
D1
X
X
D1
0
0
1
1
D0
10 - 17
0
1
D0
0
1
0
1