AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Shutdown Mode
The AS1116 devices feature a shutdown mode, where they consume only 200nA (typ) current. Shutdown mode is
entered via a write to the Shutdown Register (see
For the AS1116, at that point, all segment current sources
and digital drivers are switched off, so that all segments are blanked.
Note:
During shutdown mode the Digit-Registers maintain their data.
Shutdown mode can either be used as a means to reduce power consumption or for generating a flashing display
(repeatedly entering and leaving shutdown mode). For minimum supply current in shutdown mode, logic input should
be at GND or V
DD
(CMOS logic level).
When entering or leaving shutdown mode, the Feature Register is reset to its default values (all 0s) when Shutdown
Register bit D7 (page 10) = 0.
Note:
When
Shutdown Register bit D7 = 1, the Feature Register is left unchanged when entering or leaving shut-
down mode. If the AS1116 is used with an external clock, Shutdown Register bit D7 should be set to 1 when
writing to the Shutdown Register.
Digit- and Control-Registers
The AS1116 devices contain 8 Digit-Registers,11 control-registers and 8 diagnostic-registers, which are listed in
7.
All registers are selected using a 8-bit address word, and communication is done via the serial interface.
!
Digit Registers – These registers are realized with an on-chip 64-bit memory. Each digit can be controlled directly
without rewriting the whole register contents.
Control Registers – These registers consist of decode mode, display intensity, number of scanned digits, shut-
down, display test and features selection registers.
!
Table 7. Register Address Map
Type
Register
Address
D15
D14
D13
D12
D11
D10
D9
D8
D7:D0
Page
No-Op
Digit 0
Digit 1
Digit Register
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0/1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
(see
and
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Digit 2
Digit 3
Digit 4
Digit 5
Digit 6
Digit 7
Decode-Mode
Global Intensity
Scan Limit
Control Register
Shutdown
Not Used
Feature
Display Test Mode
DIG0:DIG1 Intensity
DIG2:DIG3 Intensity
DIG4:DIG5 Intensity
DIG6:DIG7 Intensity
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