HD66717 Datasheet, PDF (84/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
6. The TEST pin must be grounded and the ID5 to ID0, IM1, IM0, SFT, EXM, and OPOFF pins must
be grounded or connected to V_CC.
7. Applies to the ACK bit for I²C bus interface.
8. Applies to resistor values (RCOM) between power supply pins V_CC, V1OUT, V4OUT, V5OUT and
common signal pins (COM1 to COM32, COMS1, and COMS2), and resistor values (RSEG) between
power supply pins V_CC, V2OUT, V3OUT, V5OUT and segment signal pins (SEG1 to SEG60).
9. This excludes the current flowing through pull-up MOSs and output drive MOSs.
10. This excludes the current flowing through the input/output units. The input level must be fixed high or
low because through current increases if the CMOS input is left floating.
11. The following shows the relationship between the operation frequency (f_OSC) and current consumption
(I_CC) (Figure 47).
V_CC = 3V
40
1/34
duty
Display on (typ.)80
1/26
duty
30
1/18
duty
Sleep (typ.)
60
20
1/10
duty
40
10
20
V_CC = 3V
VREF=VREFP Short-circuited
VREF left disconnected
VREF=VREFP=VRERM
Short-circuited
VREF–VREFM
Short-circuited
Standby (typ.)
0
0 50 100 150 200 250
0
3 4 5 6 7 8 9 10 11
CR oscillator frequency
Liquid crystal drive voltage : VLCD (V)
Figure 47 Relationship between the Operation Frequency and Current Consumption
12. Each COM and SEG output voltage is within ±0.15V of the LCD voltage (V_CC, V1, V2, V3, V4, V5)
when there is no load.
13. Applies to the external clock input (Figure 48).
Oscillator
Open
OSC1
OSC2
0.7V_CC
0.5V_CC
0.3V_CC
Th
Tl
trcp
t _fcp
Duty =
Th
Th+Tl ^{X 100%}
Figure 48 External Clock Supply
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