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HD404654 Datasheet, PDF (103/111 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer | |||
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HD404654 Series
Item
Symbol Pin(s)
Min
Typ Max
Unit Test Condition
Notes
External
t CPf
OSC1
â
â 150
ns fOSC = 400 kHz
6
clock fall
time
â
â 75
ns fOSC = 800 kHz
6
â
â 35
ns
fOSC = 2 MHz
6
â
â 25
ns fOSC = 3.58 MHz
6
â
â 20
ns
fOSC = 4 MHz
6
INT0, INT1, tIH
INT0, INT1,
2
ââ
t cyc
7
EVND high
EVND
width
INT0, INT1, tIL
INT0, INT1,
2
ââ
t cyc
7
EVND low
EVND
width
RESET low tRSTL
RESET
2
ââ
t cyc
8
width
STOPC low tSTPL
STOPC
1
ââ
t RC
9
width
RESET rise tRSTr
RESET
â
â 20
ms
8
time
STOPC rise tSTPr
STOPC
â
â 20
ms
9
time
Input
Cin
capacitance
All pins except â
D13, D4âD7
D4âD7
â
D13
â
â
â 15
â 30
â 15
â 180
pF f = 1 MHz, Vin = 0 V
pF
pF
pF
10
Analog
t CSTB
COMP0,
â
â2
comparator
COMP1
stabilization
time
tcyc VCC = 2.7 V to 6.0 V
11, 12
â
â 20
tcyc VCC = 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 VCC
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 tRC 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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