HD404618 Datasheet, PDF (82/89 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404618 Series
Item
Symbol Pin(s)
Min Typ
Max Test Condition Unit Notes
INT₁ low
t _IL
width
INT₁
2
—
—
t _cyc
4
RESET high t_RSTH
RESET
2
—
—
width
t _cyc
5
Input
C_in
capacitance
RESET fall t_RSTf
time
D₁₀
—
—
All pins
—
—
except D₁₀
—
—
90
HD4074618:
f = 1 MHz,
V_in = 0 V
15
f = 1 MHz,
V_in = 0 V
20
pF
8
pF
ms 5
Analog
t _CSTB
D₁₂, D₁₃
—
—
2
comparator
(analog input
stabilization
mode)
time
t _cyc
7
Notes: 1. The oscillation stabilization time is the period required for the oscillator to stabilize after V_CC
reaches 2.7 V (3.0 V for HD4074618) at power-on or after RESET input goes high after stop
mode is cancelled. At power-on or when stop mode is cancelled, RESET must remain high for
at least t_RC to ensure the oscillation stabilization time. Since t_RC depends on the ceramic
oscillator’s circuit constant and stray capacitance, contact the manufacturer when designing a
reset circuit.
2. The oscillation stabilization time is the period required for the oscillator to stabilize after V_CC
reaches 2.7 V (3.0 V for HD4074618) at power-on. The oscillation stabilization time (t_RC) must be
ensured. If using a crystal oscillator, contact the manufacturer to determine what oscillation
stabilization time is required, since it depends on the circuit constants and stray capacitances.
3. See figure 50.
4. See figure 51. The unit t_cyc applies when the MCU is in standby mode or active mode.
5. See figure 52.
6. The unit t_subcyc applies when the MCU is in watch mode or subactive mode.
t_subcyc = 244.14 µs (32.768-kHz crystal oscillator)
7. The analog comparator stabilization time is the period required for the oscillator to stabilize and
for correct data to be read after D₁₂/D₁₃ is input to enter analog input mode.
8. The Max value for the HD404618, HD404616, HD404614, and HD404612 is 15pF.
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