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Renesas PROM Programming Adapters PCA7438F-64A Spezifikationen Seite 49

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Seitenansicht 48
Rev.2.40 Jun 14, 2004 page 49 of 56
38C1 Group
Table 14 Recommended operating conditions
(Vcc = 1.8 to 5.5 V (One Time PROM version: 2.2 to 5.5 V), Ta = –20 to 85°C, unless otherwise noted)
Timer X and Timer Y
Input frequency (duty cycle 50%)
Main clock input frequency
(duty cycle 50%)
(Note 1)
Sub-clock input oscillation
frequency (Note 2) (Note 4)
(duty cycle 50%)
f(CNTR0)
f(CNTR1)
f(XIN)
f(XCIN)
Limits
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
kHz
Parameter
Min. Typ.
32.768
Max.
4.0
VCC
5✕VCC–8
2✕VCC–3
10✕VCC–19
3
8.0
2✕VCC
4✕VCC–6
8.0
6.0
80
Symbol Unit
(4.0 V ≤ VCC ≤ 5.5 V)
(Mask ROM version: 2.0V ≤ VCC ≤ 4.0 V)
(One Time PROM version: 3.0 V ≤ VCC ≤ 4.0 V)
(Mask ROM version: VCC ≤ 2.0 V)
(One Time PROM version: 2.5 V ≤ VCC ≤ 3.0 V)
(One Time PROM version: VCC ≤ 2.5 V)
High-speed mode (4.0 V < VCC ≤ 5.5 V)
High-speed mode
(Mask ROM version: 2.0V ≤ VCC ≤ 4.0 V)
(One Time PROM version: 3.0 V ≤ VCC ≤ 4.0 V)
High-speed mode
(One Time PROM version: 2.5 V ≤ VCC ≤ 3.0 V)
Middle-speed mode (Note 3) (Note 4)
(Mask ROM version: 2.0 V ≤ VCC ≤ 5.5 V)
(One Time PROM version: 2.5 V ≤ VCC ≤ 5.5 V)
Middle-speed mode (Note 3) (Note 4)
Notes 1: When the A/D converter is used, refer to the recommended operating condition for A/D conversion.
2: When using the microcomputer in low-speed mode, set the clock input oscillation frequency on condition that f(X
CIN) < f(XIN)/3.
3: When the timer X count source selection bit is set to “1”, as for the recommended operating condition of the main clock input frequency f(X
IN), the rating
value at the high-speed mode is applied.
4: Oscillation start voltage and oscillation start time depend on the oscillator, the circuit constant and temperature.
Especially, be careful that an oscillation start of the high-frequency oscillator may be difficult at low-voltage.
Until the oscillation is stabilized, wait in the on-chip oscillator mode.
Condition
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