IBM EM78P312N manual AC Electrical Characteristic, Bit Microcontroller

EM78P312N

8-Bit Microcontroller

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	%
Tins	Instruction cycle time	Crystal type (high frequency)	200	−	DC	ns
	(CLKS="0")	RC type	500	−	DC	ns
Ttcc	TCC input period	−	(Tins+20)/	−	−	ns
			N*
Tdrh	Device reset hold	Ta = 25°C	11.3	16.2	21.6	ms
	time
Trst	/RESET pulse width	Ta = 25°C	2000	−	−	ns
Twdt	Watchdog timer	Ta = 25°C	11.3	16.2	21.6	ms
	period
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	/SS↓ to SCK↑or SCK↓(Fmain=8 MHz)	400	−	−	ns
	time
Tdelay1	Slave mode unselect	/SS↑ to SDO output hi-impedance delay time	−	25	50	ns
	delay time

*N= selected prescaler ratio

62 • Product Specification (V1.0) 10.03.2006

(This specification is subject to change without further notice)