HD404629R Datasheet, PDF (150/157 Pages) Renesas Technology Corp – AS Microcomputer Incorporating a DTMF Generator Circuit

HD404629R Series
AC Characteristics (HD404628R, HD4046212R, HD404629R: V_CC = 2.7 to 6.0 V, GND = 0 V, T_a =
–20°C to +75°C; HD4074629: V_CC = 2.7 to 5.5 V, GND = 0 V, T_a = –20°C to +75°C, unless otherwise
specified) (cont)
Item
Symbol
Pin(s)
Min Typ Max Unit
Test Condition Notes
External clock
t_CPf
OSC₁
—
—
150 ns
f_OSC = 400 kHz 4
fall time
—
—
75
ns
f_OSC = 800 kHz 4
—
—
35
ns
f_OSC = 2 MHz
4
—
—
20
ns
f_OSC = 4 MHz
4
INT₀–INT₄, EVNB ,
t_{I H}
INT₀–INT₄,
2
—
—
t_cyc /
—
5
EVND high widths
EVNB, EVND
t_subcyc
INT₀–INT₄, EVNB ,
t_{I L}
INT₀–INT₄,
2
—
—
t_cyc /
—
5
EVND low widths
EVNB, EVND
t_subcyc
RESET high width
t_RSTH
RESET
2
—
—
t_cyc
—
6
STOPC low width
t_STPL
STOPC
1
—
—
t_RC
—
7
RESET fall time
t_RSTf
RESET
—
—
20
ms
—
6
STOPC rise time
t_STPr
STOPC
—
—
20
ms
—
7
Input capacitance
C_in
All pins
except D₁₁
—
—
15
pF
f = 1 MHz
V_in = 0 V,
D₁₁
—
—
15
pF
HD404628R,
HD4046212R,
HD404629R:
f = 1 MHz,
V_in = 0 V
—
—
180 pF
HD4074629:
f = 1 MHz,
V_in = 0 V
Notes: 1. Be sure to set system clock selection register (SSR) bits SSR1 and SSR0 to match the system
clock oscillator frequency.
2. Applies to voltage ranges V_CC = 3.5 to 5.5 V for the HD4074629.
3. There are three oscillator stabilization times.
(1) At power on, the time between the point where V_CC reaches 2.7 V and the point where
oscillation has stabilized.
(2) At clearing stop mode, the time between the point where the RESET pin reaches the high
level and the point where oscillation has stabilized.
(3) At clearing stop mode, the time between the point where the STOPC pin reaches the low level
and the point where oscillation has stabilized.
At power on or when stop mode is cleared, RESET or STOPC must be input for at least t_RC to
ensure the oscillation stabilization time.
Since the oscillator stabilization time will depend on circuit constants and stray capacitances,
determine the oscillator by consulting with the oscillator’s manufacturer.
Be sure to set miscellaneous register (MIS) bits MIS1 and MIS0 to match the system clock
oscillator stabilization time.
4. Refer to figure 108.
5. Refer to figure 109. 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 110.
7. Refer to figure 111.
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