EM78P458 Datasheet, PDF (57/76 Pages) ELAN Microelectronics Corp – 8-BIT MICRO-CONTROLLER

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")
Ttcc
TCC input period
Crystal type
RC type
100
500
(Tins+20)/N*
DC
ns
DC
ns
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
Thold
Input pin setup time
Input pin hold time
0
ms
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
V_AREF
V_ASS
VAI
Analog reference voltage
Analog input voltage
IAI
Analog supply current
RN
Resolution
LN
Linearity error
DNL Differential nonlinear error
FSE
Full scale error
OE
Offset error
ZAI
Recommended impedance of
analog voltage source
TAD
A/D clock period
TCN
A/D conversion time
ADIV A/D OP input voltage range
ADOV A/D OP output voltage swing
ADSR
PSR
A/D OP slew rate
Power Supply Rejection
Condition
V_AREF - V_ASS 2.5V
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd = 2.5 to 5.5V Ta=25
Vdd = 2.5 to 5.5V Ta=25
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=V_AREF=5.0V, V_ASS
=0.0V,RL=10KΩ
Vdd=V_AREF=5.0V, V_ASS =0.0V
Vdd=5.0V±0.5V
Note: 1.These parameters are characterized but not tested.
Min.
3.0
V_ASS
500
6
0
0
±0
±0
0
3
10
0
0
4.7
0.1
±0
Typ.
Max. Unit
Vdd
V
Vss
V
V_AREF
V
700
1000 uA
7
8
Bits
±2
±4 LSB
±0.5
±0.9 LSB
±2
±4 LSB
±1
±2 LSB
8
10
KΩ
3.5
4
us
10 TAD
5
V
0.2
0.3
V
4.8
5
0.3
V/us
±2 LSB
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.
This specification is subject to change without prior notice.
57
06.25.2004 (V1.4)