HD404849 Datasheet, PDF (120/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
• After STOPC input goes low when stop mode is cancelled
At power-on or when stop mode is cancelled, RESET or STOPC must be input for at least t_RC to
ensure the oscillation stabilization time. If using a ceramic or crystal oscillator, contact its
manufacturer to determine what stabilization time is required since it will depend on the circuit
constants and stray capacitances.
4. See figure 95.
5. See figure 96.
6. See figure 97.
7. See figure 98.
8. The max value for the HD404848, HD4048412, HD404849 is 15 pF.
Serial Interface Timing Characteristics (HD404848/HD4048412/HD404849: V_CC = 2.7 to 6.0 V, GND
= 0 V, T_a = –20°C to +75°C; HD4074849: V_CC = 2.7 to 5.5 V, GND = 0 V, T_a = –20°C to +75°C, unless
otherwise specified)
During Transmit Clock Output
Item
Symbol Pin Min Typ Max Unit Test Condition
Transmit clock cycle time
t _Scyc
SCK 1.0 — — t_cyc Load shown in figure
100
Transmit clock high width
t _SCKH
SCK 0.4 — — t_Scyc Load shown in figure
100
Transmit clock low width
t _SCKL
SCK 0.4 — — t_Scyc Load shown in figure
100
Transmit clock rise time
t _SCKr
SCK — — 100 ns Load shown in figure
100
Transmit clock fall time
t _SCKf
SCK — — 100 ns Load shown in figure
100
Serial output data delay time t_DSO
SO — — 300 ns Load shown in figure
100
Serial input data setup time t_SSI
Serial input data hold time t_HSI
Note: 1. Refer to figure 99.
SI 200 — — ns —
SI 200 — — ns —
Note
1
1
1
1
1
1
1
1
120