HD66421 Datasheet, PDF (46/46 Pages) Hitachi Semiconductor – (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)

Preliminary
Rev. 1.1E '99.02.10
HD66421
AC Characteristics (Vcc = 2.2 to 5.5V, GND = 0V, Ta = -40 to +85°C Note 1)
Clock Characteristics
Item
Oscillation frequency
External clock frequency
External clock duty cycle
External clock fall time
External clock rise time
Symbol
fOSC
fCP
Duty
tr
tf
Min
160
50
45
–
–
Typ
220
–
50
–
–
Max Unit
280 kHz
400 kHz
55 %
0.2 µs
0.2 µs
Notes
Rf = 180kΩ, Vcc = 3.0V
MPU Interface
Item
RD low-level width
RD high-level width
WR low-level width
WR high-level width
Address setup time
Address hold time
Data delay time
Data output hold time
Data setup time
Data hold time
Symbol
tWRDL
tWRDH
tWWRL
tWWRH
tAS
tAH
tDDR
tDHR
tDSW
tDHW
Min Typ
Max
Unit Notes
250 – 4tOSC - 450 ns Vcc = 2.2V to 3.0V, 2
190 – 4tOSC - 450 ns Vcc = 3.0V to 5.5V, 2
450 –
–
ns
250 – 4tOSC - 450 ns Vcc = 2.2V to 3.0V, 2
190 – 4tOSC - 450 ns Vcc = 3.0V to 5.5V, 2
450 –
–
ns
20
–
–
ns
20
–
–
ns
–
–
180
ns Vcc = 2.2V to 3.0V
–
–
150
ns Vcc = 3.0V to 5.5V
20
–
–
ns
150 –
100 –
–
ns Vcc = 2.2V to 3.0V
–
ns Vcc = 3.0V to 5.5V
10
–
–
ns
Reset Timing
Item
Symbol Min Typ Max Unit
RES low-level width
tRES
1
–
– ms
Note 1 All electrical characteristic are guaranteed at +85°C for die products.
Note 2 tOSC = 1 / fOSC
tWRDL
tWRDH
Notes
RD
tWWRH
tWWRL
WR
tAS
tAH
tAS
tAH
RS,CS
DB7-
DB0
tDDR
tDHR
Figure 44 MPU Interface
Notes. The following load circuit is connected for specification.
VOH and VOL of the timing specification is 1/2 VCC level.
Output terminal
tDSW
tDHW
30pF(includes board capacitance)
46