EM78P5840/5841/5842
8-bit Micro-controller
XI. AC Electrical Characteristic
CPU instruction timing (Ta = 25°C, AVDD=VDD=5V, VSS=0V)
Parameter
Symbol Condition
Dclk
Min
45
Typ
50
Max
Unit
%
Input CLK duty cycle
Instruction cycle time
55
Tins
32.768kHz
3.582MHz
60
us
550
16
ns
Device delay hold time
TCC input period
Tdrh
Ttcc
Twdt
ms
ns
Note 1
(Tins+20)/N
16-30%
Watchdog timer period
Ta = 25°C
16
16+30%
ms
Note 1: N= selected prescaler ratio.
ADC characteristic (VDD = 5V, Ta = +25°C, for internal reference voltage)
Parameter
Symbol
Vofh
Condition
Min
Typ
44
Max
52.8
38.4
Unit
mV
mV
Upper bound offset voltage
Lower bound offset voltage
Vofl
32
*These parameters are characterized but not tested.
* About ADC characteristic, please refer to next page.
Timing characteristic (AVDD=VDD=5V,Ta=+25°C)
Description
Symbol Min Typ Max Unit
Oscillator timing characteristic
Crystal start up
32.768kHz
Tosc
400
3
1500 ms
10 us
3.579MHz PLL
5
Timing characteristic of reset
The minimum width of reset low pulse
The delay between reset and program start
Trst
Tdrs
uS
mS
18
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
39
2004/11/10 V2.6
ELAN [ ELAN MICROELECTRONICS CORP ]
