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6.2 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
Tsetup2 Slave mode setup
time
Tdelay1 Slave mode unselect
delay time
* N= selected prescaler ratio
Product Specification (V1.0) 07.26.2005
(This specification is subject to change without further notice)
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
EM78P809N
8-Bit Microcontroller
Min
Typ Max Unit
45
50
55
%
200
DC
ns
500
DC
ns
(Tins+20)/
ns
N*
11.3
16.2 21.6
ms
2000
ns
11.3
16.2 21.6
ms
0
ns
20
ns
50
ns
-
25
50
ns
-
25
50
ns
-
25
50
ns
200
-
-
ns
200
-
-
ns
400
-
-
ns
-
25
50
ns
• 67
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