HD404318 Datasheet, PDF (63/68 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
Serial Interface Timing Characteristics (V_CC = 4.0 to 5.5 V, GND = 0 V, V_disp = V_CC – 40 V to V_CC, T_a =
–20 to +75°C, unless otherwise specified)
During Transmit Clock Output
Item
Symbol Pins
Transmit clock cycle time t_Scyc
Transmit clock high width t_SCKH
Transmit clock low width t_SCKL
Transmit clock rise time t_SCKr
Transmit clock fall time t_SCKf
Serial output data delay t_DSO
time
SCK
SCK
SCK
SCK
SCK
SO
Serial input data setup t_SSI
SI
time
Serial input data hold time t_HSI
SI
Min Typ Max Unit Test Condition
Note
1—
0.4 —
0.4 —
——
— t_cyc Load shown in figure 56 1
— t_Scyc Load shown in figure 56 1
— t_Scyc Load shown in figure 56 1
80 ns Load shown in figure 56 1
— — 80 ns Load shown in figure 56 1
— — 300 ns Load shown in figure 56 1
100 — — ns
1
200 — — ns
1
During Transmit Clock Input
Item
Symbol Pins
Transmit clock cycle time t_Scyc
Transmit clock high width t_SCKH
Transmit clock low width t_SCKL
Transmit clock rise time t_SCKr
Transmit clock fall time t_SCKf
Serial output data delay t_DSO
time
SCK
SCK
SCK
SCK
SCK
SO
Serial input data setup t_SSI
SI
time
Serial input data hold time t_HSI
SI
Note: 1. Refer to figure 55.
Min Typ Max Unit Test Condition
Note
1
—
—
t _cyc
1
0.4 —
—
t _Scyc
1
0.4 —
—
t _Scyc
1
— — 80 ns
1
— — 80 ns
1
— — 300 ns Load shown in figure 56 1
100 — — ns
1
200 — — ns
1
OSC₁
1/f_CP
V_CC – 0.5 V
0.5 V
t_CPH
t_CPL
t_CPr
t_CPf
Figure 51 External Clock Timing
61