HD404449 Datasheet, PDF (117/123 Pages) Hitachi Semiconductor – HD404449 SERIES

HD404449 Series
Item
Symbol Pin(s)
Min Typ Max Unit Test Condition
Notes
Input capacitance C_in
All pins except D₁₃ — — 15 pF f = 1 MHz, V_in = 0 V
D₁₃
— — 15 pF HD404448,
HD404449:
f = 1 MHz,
V_in = 0 V
— — 180 pF HD4074449:
f = 1 MHz,
V_in = 0 V
Notes: 1. If the 32.768-kHz oscillator is used for the subsystem oscillator, f_OSC must be set as 0.4 MHz ≤
f_OSC ≤ 1.0 MHz or 1.6 MHz ≤ f_OSC ≤ 4.0 MHz, and bit 1 of the system clock selector register (SSR:
$029) must be set to 0 or 1, respectively.
2. The oscillation stabilization time is the period required for the oscillator to stabilize after V_CC
reaches 2.7 V at power-on, or after RESET input goes high or 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 oscillator,
contact its manufacturer to determine what stabilization time is required, since it will depend on
the circuit constants and stray capacitances. Set bits 0 and 1 (MIS0, MIS1) of the miscellaneous
register (MIS: $00C) according to the system oscillation of the oscillation stabilization time.
3. The oscillation stabilization time is the period required for the oscillator to stabilize after V_CC
reaches 2.7 V at power-on, or after RESET input goes high or STOPC input goes low when the
32-kHz oscillator stops in stop mode and stop mode is cancelled. If using a crystal oscillator,
contact its manufacturer to determine what stabilization time is required, since it will depend on
the circuit constants and stray capacitances.
4. Refer to figure 94.
5. Refer to figure 95. The t_cyc unit applies when the MCU is in standby or active mode. The t_subcyc
unit applies when the MCU is in watch or subactive mode.
6. Refer to figure 96.
7. Refer to figure 97.
117