HD404654 Datasheet, PDF (101/109 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404654 Series
Item
Symbol Pin(s)
Min
Typ Max
Unit Test Condition
Notes
External
t _CPf
OSC₁
—
— 150
ns f_OSC = 400 kHz
6
clock fall
time
—
— 75
ns f_OSC = 800 kHz
6
—
— 35
ns
f_OSC = 2 MHz
6
—
— 25
ns f_OSC = 3.58 MHz
6
—
— 20
ns
f_OSC = 4 MHz
6
INT₀, INT₁, t_IH
INT₀, INT₁,
2
——
t _cyc
7
EVND high
EVND
width
INT₀, INT₁, t_IL
INT₀, INT₁,
2
——
t _cyc
7
EVND low
EVND
width
RESET low t_RSTL
RESET
2
——
t _cyc
8
width
STOPC low t_STPL
STOPC
1
——
t _RC
9
width
RESET rise t_RSTr
RESET
—
— 20
ms
8
time
STOPC rise t_STPr
STOPC
—
— 20
ms
9
time
Input
C_in
capacitance
All pins except —
D₁₃, D₄–D₇
D₄–D₇
—
D₁₃
—
—
— 15
— 30
— 15
— 180
pF f = 1 MHz, V_in = 0 V
pF
pF
pF
10
Analog
t _CSTB
COMP₀,
—
—2
comparator
COMP₁
stabilization
time
t_cyc V_CC = 2.7 V to 6.0 V
11, 12
—
— 20
t_cyc V_CC = 1.8 V to 2.7 V
Notes: 1. Bits 0 and 1 (SSR10, SSR11) of system clock select register 1 (SSR1: $029) and bit 2 (SSR22)
of system clock select register 2 (SSR2: $02A) must be set according to the system clock
frequency.
2. SEL = 1
3. SEL = 0
4. The oscillation stabilization time is the period required for the oscillator to stabilize after V_CC
reaches 2.7 V (1.8 V for HD404654 and HD404652) at power-on, after RESET input goes low
when stop mode is cancelled, or after 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_RC 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 capacitance.
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