ICM7245_14 Datasheet, PDF (2/13 Pages) Intersil Corporation – 8-Character, 16-Segment, Microprocessor Compatible,LED Display Decoder Driver

Pin Configuration
ICM7245
ICM7245 (16-SEGMENT CHARACTER)
(44 LD MQFP)
TOP VIEW
SEG d1
SEG a1
SEG a2
D0
D1
D2
D3
D4
D5
CS
NC
44 43 42 41 40 39 38 37 36 35 34
1
33
2
32
3
31
4
30
5
29
6
28
7
27
8
26
9
25
10
24
11
23
12 13 14 15 16 17 18 19 20 21 22
SEG d2
DP
SEG h
SEG j
MODE
A₀/SEN
A₁/CLR
A₂/DISP FULL
OSC/OFF
CHAR1
NC
Pin Descriptions
SIGNAL
PIN
FUNCTION
D0 - D5
4 thru 9 6-Bit ASCll Data input pins (active high).
CS
10
Chip Select from µP address decoder, etc.
WR
13
WRite pulse input pin (active low). For an active high write pulse, CS can be used.
MODE
29
Selects data entry MODE. High selects Sequential Access (SA) mode where first entry is displayed
in “leftmost” character and subsequent entries appear to the “right”. Low selects Random Access
(RA) mode where data is displayed on the character addressed via A0 thru A2 Address pins.
A0/SEN
28
In RA mode it is the LSB of the character Address. In SA mode it is used for cascading devices for
displays of more than 8 characters (active high enables device controller).
A1/CLR
27
In RA mode this is the second bit of the address. In SA mode, a low input will CLeaR the Serial
Address Counter, the Data Memory and the display.
A2/DISP FULL
26
In RA mode this is the MSB of the Address. In SA mode, the output goes high after 8 entries,
indicating DISPlay FULL.
OSC/OFF
25
OSCillator input pin. Adding capacitance to V_DD will lower the internal oscillator frequency. An
external oscillator can be applied to this pin. A low at this input sets the device into a (shutdown)
mode, shutting OFF the display and oscillator but retaining data stored in memory.
SEG d1, SEG a1, SEG a2;
SEG j, SEG h, DP, SEG d2, SEG f, SEG i,
SEG b, SEG g2, SEG I;
SEG m, SEG e, SEG g1, SEG k, SEG c
1 thru 3,
30 thru 38
40 thru 44
SEGment driver outputs.
CHAR8 thru CHAR5,
CHAR4 thru CHAR2, CHAR1
14 thru 17, CHARacter driver outputs.
19 thru 21, 24
V_SS
18
Supply Ground.
V_DD
39
Positive Power Supply +3.0V to +3.6V.
NC
11, 12, 22, 23 No connection.
2
FN8587.0
October 29, 2013