HD404328 Datasheet, PDF (88/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER

HD404328 Series
Item
Symbol Pin(s)
Min Typ Max Unit Test Conditions
Note
RESET high width
RESET fall time
Input capacitance
t_RSTH
t_RSTf
C_in
RESET
2
——
RESET
—
—
20
All pins except —
—
30
D₁₀, AN₀–AN₃
D₁₀
—
—
30
f_cyc
6
ms
6
pF f = 1 MHz, V_in = 0.0 V
pF HD404324,
HD404324U,
HD404326,
HD404326U,
HD404328,
HD404328U:
f = 1 MHz,
V_in = 0.0 V
—
— 180
pF HD4074329,
HD4074329U:
f = 1 MHz,
V_in = 0.0 V
Notes: 1. If f_OSC = 0.4 MHz to 1.0 MHz, bit 3 of the miscellaneous register (MIS: $00C) must be set to 1; if
f_OSC = 1.6 MHz to 4.5 MHz, bit 3 must be set to 0. Do not use f_OSC = 1.0 MHz to1.6 MHz with 32-
kHz oscillation.
2. The oscillation stabilization time is the time required for the oscillator to stabilize after V_CC
reaches 2.7 V (2.9 V for the HD4074329 and HD4074329U, or 3.5 V if V_CC = 3.5 V to 5.5 V) at
power-on or after RESET input goes high after stop mode is canceled. At power-on and when
stop mode is cancelled, RESET must be input for at least t_RC to ensure the oscillation
stabilization time. If using a crystal oscillator or a ceramic oscillator, contact its manufacturer to
determine what stabilization time is required, since it will depend on the circuit constants and
stray capacitances.
3. The oscillation stabilization time is the time required for the oscillator to stabilize after V_CC
reaches 2.7 V (2.9 V for the HD4074329 and HD4074329U) at power-on—at least t_RC must be
ensured. If using a 32.768-kHz 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 49.
5. Refer to figure 50. 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. t_subcyc = 244.14 µs (32.768-
kHz crystal)
6. Refer to figure 51.
86