Data Sheet

www.austriamicrosystems.com/LED-Driver-ICs/AS1115 Revision 1.08 18 - 25
AS1115
Datasheet - D e t a iled D e s c r iptio n
Feature Register (0x0E)
The Feature Register is used for enabling various features including switching the device into external clock mode, applying an external reset,
selecting code-B or HEX decoding, enabling or disabling blinking, setting the blinking rate, and resetting the blink timing.
Note: At power-up the Feature Register is initialized to 0.
Table 20. Feature Register Summary
D7 D6 D5 D4 D3 D2 D1 D0
blink_
start
sync
blink_
freq_sel
blink_en NU decode_sel reg_res clk_en
Table 21. Feature Register Bit Descriptions (Address (HEX) = 0xXE)
Addr: 0xXE
Feature Register
Enables and disables various device features.
Bit Bit Name Default Access Bit Description
D0 clk_en
0 R/W
External clock active.
0 = Internal oscillator is used for system clock.
1 = Pin CLK of the serial interface operates as system clock input.
D1 reg_res
0 R/W
Resets all control registers except the Feature Register.
0 = Reset Disabled. Normal operation.
1 = All control registers are reset to default state (except the Feature Register)
identically after power-up.
Note: The Digit Registers maintain their data.
D2 decode_sel
0 R/W
Selects display decoding for the selected digits (Table 8 on page 13).
0 = Enable Code-B decoding (see Table 9 on page 14).
1 = Enable HEX decoding (see Table 10 on page 14).
D3 NU Not used
D4 blink_en
0 R/W
Enables blinking.
0 = Disable blinking. 1 = Enable blinking.
D5 blink_freq_sel
0 R/W
Sets blink with low frequency (with the internal oscillator enabled):
0 = Blink period typically is 1 second (0.5s on, 0.5s off).
1 = Blink period is 2 seconds (1s on, 1s off).
D6 sync
0 R/W
Synchronizes blinking on the rising edge of pin LD/CS. The multiplex and blink timing
counter is cleared on the rising edge of pin LD/CS. By setting this bit in multiple devices,
the blink timing can be synchronized across all the devices.
D7 blink_start
0 R/W
Start Blinking with display enabled phase. When bit D4 (blink_en) is set, bit D7
determines how blinking starts.
0 = Blinking starts with the display turned off.
1 = Blinking starts with the display turned on.
ams AG
Technical content still valid