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EM78P458/459
OTP ROM
6.2 AC Electrical Characteristic
(Ta=0
°
C ~ 70
°
C, VDD=5V
±
5%, VSS=0V)
Symbol Parameter Conditions Min Typ Max Unit
Dclk Input CLK duty cycle 45 50 55 %
Tins
Instruction cycle time
(CLKS="0")
Crystal type
RC type
100
500
DC
DC
ns
ns
Ttcc TCC input period (Tins+20)/N* ns
Tdrh Device reset hold time
Ta = 25°C
9 18 30 ms
Trst /RESET pulse width
Ta = 25°C
2000 ns
Twdt Watchdog timer period
Ta = 25°C
9 18 30 ms
Tset Input pin setup time 0 ms
Thold Input pin hold time 20 ms
Tdelay Output pin delay time Cload=20pF 50 ms
*N= selected prescaler ratio.
6.3 A/D Converter Characteristic
(Vdd=3.0V to 5.5V,Vss=0V,Ta=0 to 70
℃
)
Symbol Parameter Condition Min. Typ. Max. Unit
V
AREF
3.0 Vdd V
V
ASS
Analog reference voltage
V
AREF
- V
ASS
≧2.5V
Vss V
VAI Analog input voltage V
ASS
V
AREF
V
IAI Analog supply current Vdd=V
AREF
=5.0V, V
ASS
=0.0V 500 700 1000 uA
RN Resolution Vdd=V
AREF
=5.0V, V
ASS
=0.0V 6 7 8 Bits
LN Linearity error
Vdd = 2.5 to 5.5V Ta=25℃
0 ±2 ±4 LSB
DNL Differential nonlinear error
Vdd = 2.5 to 5.5V Ta=25℃
0 ±0.5 ±0.9 LSB
FSE Full scale error Vdd=V
AREF
=5.0V, V
ASS
=0.0V ±0 ±2 ±4 LSB
OE Offset error Vdd=V
AREF
=5.0V, V
ASS
=0.0V ±0 ±1 ±2 LSB
ZAI
Recommended impedance of
analog voltage source
0 8 10 KΩ
TAD A/D clock period Vdd=V
AREF
=5.0V, V
ASS
=0.0V 3 3.5 4 us
TCN A/D conversion time Vdd=V
AREF
=5.0V, V
ASS
=0.0V 10 10 TAD
ADIV A/D OP input voltage range Vdd=V
AREF
=5.0V, V
ASS
=0.0V 0 5 V
0 0.2 0.3
ADOV A/D OP output voltage swing
Vdd=V
AREF
=5.0V, V
ASS
=0.0V,RL=10KΩ
4.7 4.8 5
V
ADSR A/D OP slew rate Vdd=V
AREF
=5.0V, V
ASS
=0.0V 0.1 0.3 V/us
PSR Power Supply Rejection Vdd=5.0V±0.5V ±0 ±2 LSB
Note: 1.These parameters are characterized but not tested.
2.These parameters are for design guidance only and are not tested.
3.It will not consume any current other than minor leakage current, when A/D is off.
4.The A/D conversion result never decrease with an increase in the input voltage, and has no
missing code.
5.Specifications subject to change without notice.
6.4 Comparator(OP) Characteristic
(Vdd = 5.0V,Vss=0V,Ta=0 to 70℃)
Symbol Parameter Condition Min. Typ. Max. Unit
SR Slew rate 0.1 0.2 V/us
This specification is subject to change without prior notice. 07.01.2003 (V1.3)
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