Displays – Purdy AND671WGST-LED User Manual
Page 5
Displays
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
Tel: 408-523-8200 • Fax: 408-733-1287 • [email protected] •
www.purdyelectronics.com
6/20/11
5
Timing Characteristics
(Ta = 25 ºC, VCC = 2.7V)
Symbol
Characteristics
Test Condition
Specifi cations
Units
Min.
Typ.
Max.
Internal Clock Operation
f
OSC
ff
OSC Frequency
R = 75KΩ
190
270
350
KHz
External Clock Operation
f
EX
External Frequency
–
125
270
410
KHz
Duty Cycle
–
45
50
55
%
T
R
, T
F
Rise/Fall Time
–
–
–
0.2
μ
s
Write Mode (Writing data from MPU to ST7066U)
T
C
Enable Cycle Time
Pin E
1200
–
–
ns
T
PW
Enable Plus Time
Pin E
460
–
–
ns
T
R
, T
F
Enable Rise/Fall Time
Pin E
–
–
25
ns
T
AS
TT
Address Setup Time
Pins RS, RW, E
0
–
–
ns
T
AH
TT
Address Hold Time
Pins RS, RW, E
10
–
–
ns
T
DSW
Data Setup Time
Pins: DB0 - DB7
80
–
–
ns
T
H
Data Hold Time
Pins: DB0 - DB7
10
–
–
ns
Read Mode (Reading Data from ST7066U to MPU)
T
C
Enable Cycle Time
Pin E
1200
–
–
ns
T
PW
Enable Pulse Width
Pin E
480
–
–
ns
T
R
, T
F
Enable Rise/Fall Time
Pin E
–
–
25
ns
T
AS
TT
Address Setup Time
Pins: RS, RW, E
0
–
–
ns
T
AH
TT
Address Hold Time
Pins: RS, RW, E
10
–
–
ns
T
DOR
Data Setup Time
Pins: DB0 - DB&
–
–
320
ns
T
H
Data Hold Time
Pins: DB0 - DB7
10
–
–
ns