EM78P312N
8-Bit Microcontroller
62
•
Product Specification (V1.0) 10.03.2006
(This specification is subject to change without further notice)
7.2 AC Electrical Characteristic
Ta=- 40
°
C ~ 85
°
C, VDD=5V
±
5%, VSS=0V
Symbol
Parameter
Conditions
Min
Typ Max Unit
Dclk
Input CLK duty cycle
−
45
50
55
%
Crystal type (high frequency)
200
−
DC ns
Tins
Instruction cycle time
(CLKS="0")
RC type
500
−
DC ns
Ttcc TCC
input
period
−
(Tins+20)/
N*
−
−
ns
Tdrh
Device reset hold
time
Ta = 25
°
C 11.3
16.2
21.6
ms
Trst
/RESET pulse width Ta = 25
°
C 2000
−
−
ns
Twdt
Watchdog timer
period
Ta = 25
°
C 11.3
16.2
21.6
ms
Tset
Input pin setup time
−
−
0
−
ns
Thold
Input pin hold time
−
−
20
−
ns
Tdelay Output pin delay time Cload=20pF
−
50
−
ns
Tstup1 SDI data setup time
Setup time of SDI data input to SCK
↑
or SCK
↓
−
25
50
ns
Thold1 SDI data hold time
Hold time of SDI data input to SCK
↓
or SCK
↑
−
25
50
ns
Tvalid1 SDO output valid time SCK
↑
or SCK
↓
to SDO data output
−
25
50
ns
Tsckh SCK input high time
Slave mode (Fmain=8 MHz)
200
−
−
ns
Tsckl
SCK input low time
Slave mode (Fmain=8 MHz)
200
−
−
ns
Tsetup2
Slave mode setup
time
/SS
↓
to SCK
↑
or SCK
↓
(Fmain=8 MHz)
400
−
−
ns
Tdelay1
Slave mode unselect
delay time
/SS
↑
to SDO output hi-impedance delay time
−
25
50
ns
*
N= selected prescaler ratio
