HD404818 Datasheet, PDF (95/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
2. The oscillator stabilization time is the period from when V_CC reaches 2.7 V (HD407L4818: V_CC =
3.0 V) at power-on until the oscillator stabilizes. The time required to stabilize the oscillator (t_RC)
must be obtained. Since t_RC depends on the ceramic oscillator’s circuit constant and stray
capacitance, consult with the ceramic oscillator manufacturer.
3. See figure 48.
4. See figure 49. The unit t_cyc is applied when the MCU is in standby mode or active mode.
5. See figure 50.
6. See figure 49. The unit t_subcyc is applied when the MCU is in watch mode or subactive mode.
t_subcyc = 244.14 µs (when a 32.768-kHz crystal oscillator is used)
7. The analog comparator stabilization time is the period from when D₁₂/D₁₃ is placed in analog
input mode until the analog comparator stabilizes and correct data can be read.
8. Applies to HD40L4812, HD40L4814, HD40L4816, and HD40L4818.
9. Applies to HD407L4818.
Serial Interface Timing Characteristics
During Transmit Clock Output (HD40L4812, HD40L4814, HD40L4816, HD40L4818: V_CC = 2.7 to 6
V; HD407L4818: V_CC = 3 to 5.5 V; GND = 0 V, T_a = –20°C to +75°C, unless otherwise specified)
Item
Transmit clock cycle time
Symbol Pin(s) Min Typ
t _Scyc
SCK 1
Transmit clock high and low t , _SCKH
widths
t _SCKL
Transmit clock rise and fall
times
t , _SCKr
t _SCKf
Serial output data delay time t_DSO
Serial input data setup time t_SSI
Serial input data hold time t_HSI
SCK 0.5
SCK
SO
SI
300
SI
300
Max
Unit
t _cyc /
t _subcyc
t _Scyc
Test Condition
200 ns
500 ns
ns
ns
Notes
1, 2, 4
1, 2
1, 2
1, 2
1
1
93