HD404818 Datasheet, PDF (87/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
Serial Interface Timing Characteristics
During Transmit Clock Output (HD404812, HD404814, HD404816, HD404818: V_CC = 4 to 6 V;
HD4074818: V_CC = 4 to 5.5 V; GND = 0 V, T_a = –20°C to +75°C, unless otherwise specified)
Item
Symbol Pin Min
Transmit clock cycle time t_Scyc
SCK 1
Transmit clock high and t t _{SCKH, SCKL} SCK 0.5
low widths
Transmit clock rise and
fall times
t t _{SCKr, SCKf} SCK
Serial output data delay t_DSO
SO
time
Serial input data setup t_SSI
time
SI
200
Serial input data hold time t_HSI
SI
150
Typ
Max
Unit
t _cyc /
t _subcyc
t _Scyc
Test Condition
100 ns
300 ns
ns
ns
Notes
1, 2, 4
1, 2
1, 2
1, 2
1
1
During Transmit Clock Input
Item
Symbol Pin Min Typ Max Unit Test Condition Notes
Transmit clock cycle time t_Scyc
SCK 1
Transmit clock high and t t _{SCKH, SCKL} SCK 0.5
low widths
t _cyc /
t _subcyc
t _Scyc
1, 4
1
Transmit clock rise and t_SCKr,
SCK
100 ns
1
fall times
t _SCKf
Serial output data delay t_DSO
SO
300 ns
1, 2
time
Serial input data setup t_SSI
SI
200
ns
1
time
Serial input data hold time t_HSI
SI
150
ns
1
Transmit clock completion t_SCKHD
detect time
SCK 1
t _cyc /
t _subcyc
1,2, 3, 4
Notes: 1. See figure 46.
2. See figure 47.
3. The transmit clock completion detect time is the high level period after 8 pulses of transmit
clocks are input. The serial interrupt request flag is not set if the next transmit clock is input
before the transmit clock completion detect time has passed.
4. The unit t_subcyc is applied when the MCU is in subactive mode. t_subcyc = 244.14 µs (for a 32.768-
kHz crystal oscillator).
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