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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