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
