AS1116 datasheet(9/20 Pages) AMSCO

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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 Table 8). 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 VDD (CMOS logic level).

When entering or leaving shutdown mode, the Feature Register is reset to its default values (all 0s) when Shutdown

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 Table

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

Address

Page

D15

D14

D13

D12

D11

D10

D7:D0

No-Op

Digit 0

(see Table 10 on page 11,

Table 11 on page 11 and

Table 12 on page 11)

N/A

Digit 1

N/A

Digit 2

N/A

Digit 3

N/A

Digit 4

N/A

Digit 5

N/A

Digit 6

N/A

Digit 7

N/A

Decode-Mode

(see Table 9 on page 10)

Global Intensity

(see Table 16 on page 13)

Scan Limit

(see Table 18 on page 13)

Shutdown

(see Table 8 on page 10)

Not Used

N/A

Feature

0/1

(see Table 19 on page 14)

Display Test Mode

(see Table 13 on page 12)

DIG0:DIG1 Intensity

(see Table 17 on page 13)

DIG2:DIG3 Intensity

(see Table 17 on page 13)

DIG4:DIG5 Intensity

(see Table 17 on page 13)

DIG6:DIG7 Intensity

(see Table 17 on page 13)

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