EM785830AA
8-bit Micro-controller
XI. AC Electrical Characteristic
CPU instruction timing (Ta = 25°C, AVDD=VDD=5V, VSS=0V)
Parameter
Symbol Condition
Dclk
Min
45
Typ
50
Max
55
Unit
%
Input CLK duty cycle
Instruction cycle time
Tins
32.768kHz
3.582MHz
60
us
550
16
ns
Device delay hold time
TCC input period
Tdrh
Ttcc
Twdt
ms
ns
Note 1
(Tins+20)/N
Watchdog timer period
Ta = 25°C
16
ms
Note 1: N= selected prescaler ratio.
ADC characteristic (VDD = 5V, Ta = +25°C, for internal reference voltage)
Parameter
Symbol
Vofh
Condition
Min
Typ
44
Max
52.8
38.4
Unit
mV
mV
Upper bound offset voltage
Lower bound offset voltage
Vofl
32
*These parameters are characterized but not tested.
* About ADC characteristic, please refer to next page.
Timing characteristic (AVDD=VDD=5V,Ta=+25°C)
Symbol
Description
Min Typ Max Unit
Oscillator timing characteristic
OSC start up
32.768kHz
Toscs
400
1500 ms
10 us
3.579MHz PLL
5
SPI timing characteristic (CPU clock 3.58MHz and Fsco = 3.58Mhz /2)
/SS set-up time
/SS hold time
SCLK high time
SCLK low time
SCLK rising time
SCLK falling time
SDI set-up time to the reading edge of SCLK
SDI hold time to the reading edge of SCLK
SDO disable time
Tcss
Tcsh
Thi
Tlo
Tr
560
250
250
250
ns
ns
ns
ns
ns
ns
ns
15
15
30
30
Tf
Tisu
Tihd
Tdis
25
25
560 ns
Timing characteristic of reset
The minimum width of reset low pulse
The delay between reset and program start
Trst
Tdrs
3
uS
mS
18
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* This specification is subject to be changed without notice.
35
12/1/2004 V1.6
ELAN [ ELAN MICROELECTRONICS CORP ]
