HD404318 Datasheet, PDF (62/68 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
AC 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)
Item
Symbol Pins
Min Typ Max Unit Test Condition Note
Clock oscillation
frequency
f _OSC
OSC₁, OSC₂ 0.4 4
4.5 MHz System clock
divided by 4
Instruction cycle time
t _cyc
0.89 1
10 µs
Oscillation stabilization t_RC
OSC₁, OSC₂ — — 7.5 ms
1
time (ceramic oscillator)
Oscillation stabilization t_RC
OSC₁, OSC₂ — — 40 ms
1
time (crystal oscillator)
External clock high width t_CPH
OSC₁
92 — — ns
2
External clock low width t_CPL
OSC₁
92 — — ns
2
External clock rise time t_CPr
OSC₁
— — 20 ns
2
External clock fall time t_CPf
OSC₁
— — 20 ns
2
INT₀, INT₁, EVNB high
t _IH
INT₀, INT₁, 2
—
—
t _cyc
3
widths
EVNB
INT₀, INT₁, EVNB low
t _IL
INT₀, INT₁, 2
—
—
t _cyc
3
widths
EVNB
RESET low width
STOPC low width
RESET rise time
STOPC rise time
Input capacitance
t _RSTL
RESET
2
—
—
t _cyc
4
t _STPL
STOPC
1
—
—
t _RC
5
t _RSTr
RESET
— — 20 ms
4
t _STPr
STOPC
— — 20 ms
5
C_in
All input pins — — 30 pF f = 1 MHz, V_in = 0 V
except TEST
TEST
— — 30 pF
6
— — 180 pF
7
Notes: 1. The oscillation stabilization time is the period required for the oscillator to stabilize in the
following situations:
a. After V_CC reaches 4.0 V at power-on.
b. After RESET input goes low when stop mode is cancelled.
c. After STOPC input goes low when stop mode is cancelled.
To ensure the oscillation stabilization time at power-on or when stop mode is cancelled, RESET
or STOPC must be input for at least a duration of t_RC.
When using a crystal or ceramic oscillator, consult with the manufacturer to determine what
stabilization time is required, since it will depend on the circuit constants and stray capacitance.
2. Refer to figure 51.
3. Refer to figure 52.
4. Refer to figure 53.
5. Refer to figure 54.
6. Applies to the HD404314, HD404316, and HD404318.
7. Applies to the HD4074318.
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