Ac Electrical Characteristic - IBM EM78P312N Specification

EM78P312N
8-Bit Microcontroller

7.2 AC Electrical Characteristic

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