EM78P341N/342N/343N
8-Bit Microprocessor with OTP ROM
9 AC Electrical Characteristic
Ta=-40 to 85 °C, VDD=5V±5%, VSS=0V
Symbol
Dclk
Parameter
Conditions
–
Min
Type
50
–
Max
55
DC
DC
–
Unit
%
Input CLK duty cycle
45
Crystal type
RC type
–
100
ns
Instruction cycle time
(CLKS="0")
Tins
500
–
ns
Ttcc
TCC input time period
Device reset hold time
/RESET pulse width
Watchdog timer duration
Input pin setup time
Input pin hold time
(Tins+20)/N*
–
ns
ms
ns
ms
ns
Tdrh
Trst
Ta = 25°C
Ta = 25°C
Ta = 25°C
–
11.3
2000
11.3
–
16.2
–
21.6
–
Twdt
Tset
16.2
0
21.6
–
Thold
Tdelay
Tdrc
–
15
20
50
3
25
55
5
ns
Output pin delay time
ERC delay time
Cload=20pF
45
ns
°
Ta = 25 C
1
ns
Note:1. *N = selected prescaler ratio
2. Twdt1: The Option word1 (WDTPS) is used to define the oscillator set-up time. WDT timeout
length is the same as set-up time (18ms).
3. Twdt2: The Option word1 (WDTPS) is used to define the oscillator set-up time. WDT timeout
length is the same as set-up time (4.5ms).
4. These parameters are hypothetical (not tested) and are provided for design reference only.
5. Data under minimum, typical, & maximum (Min, Typ, & Max) columns are based on hypothetical
results at 25°C. These data are for design reference use only.
6. The Watchdog timer duration is determined by code option Word1 (WDTPS).
Product Specification (V1.0) 12.01.2006
(This specification is subject to change without further notice)
• 87
ELAN [ ELAN MICROELECTRONICS CORP ]
