參數(shù)資料
型號(hào)： HD404448
廠商： Hitachi,Ltd.
英文描述： 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
中文描述： 4位HMCS400系列微機(jī)（4位單片微計(jì)算機(jī)）
文件頁數(shù)： 117/123頁
文件大?。?/td> 726K
代理商： HD404448
HD404449 Series
117
Item
Symbol
Pin(s)
Min
Typ
Max
Unit
Test Condition
Notes
Input capacitance
C
in
All pins except D
13
—
D
13
—
15
pF
f = 1 MHz, V
in
= 0 V
HD404448,
HD404449:
f = 1 MHz,
V
in
= 0 V
HD4074449:
f = 1 MHz,
V
in
= 0 V
—
—
15
pF
—
—
180
pF
Notes: 1. If the 32.768-kHz oscillator is used for the subsystem oscillator, f
must be set as 0.4 MHz
≤
f
≤
1.0 MHz or 1.6 MHz
≤
f
≤
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
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
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
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
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.
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