Rainbow Electronics DS1670 User Manual
Page 17
DS1670
17 of 17
NOTES:
1. All voltages are referenced to ground.
2. Logic 1 voltages are specified at V
CC
=3.3V, V
OH
=V
CC
for capacitive loads. Excludes
RST
pin.
3. Logic 0 voltages are specified at V
CC
=3.3V, V
OL
=GND for capacitive loads.
4. I
CCA
is specified with outputs open, CS set to a logic 1, SCLK=500 kHz, oscillator enabled, and D/A
converter enabled.
5. I
ADC
is specified with CS, V
CCO
open and I/O, SCLK at logic zero. A/D converter is enabled.
6. I
CCS
is specified with CS, V
CCO
open and I/O, SCLK at logic zero. A/D converter is disabled.
7. CS has a 40 k
Ω pull-down resistor to ground.
8. Measured at V
IH
=2.0V or V
IL
=0.8V and 10 ns maximum rise and fall time.
9. Measured at V
OH
=2.4V or V
OL
=0.4V.
10. Load capacitance = 50 pF.
11. I
CCO
=100 mA, V
CC
> V
CCTP
.
12. V
CCO
switchover from V
CC
to V
BAT
occurs when V
CC
drops below the lower of V
CCSW
and V
BAT
.
13. Current from V
CC
input pin to V
CCO
output pin.
14. Current from V
BAT
input pin to V
CCO
output pin.
15. Time base is generated by very accurate crystal oscillator. Accuracy of this time period is based on
the crystal that is used. A typical crystal with a specified load capacitance of 6 pF will provide an
accuracy within ±100 ppm over the 0°C to 70°C temperature range.
16. If the
EOSC
bit in the Control Register is set to a logic 1, t
RPU
is equal to 250 ms plus the start-up
time of the crystal oscillator.