EM78P809N
8-Bit Microcontroller
Product Specification
(V1.0) 07.26.2005
•
67
(This specification is subject to change without further notice)
6.2 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
