ST90158 - ELECTRICAL CHARACTERISTICS
A/D CHANNEL ENABLE TIMING TABLE
(V = 5V ± 10%, T = –40°C to +105°C, C
= 50pF, f = 24MHz, unless otherwise specified)
INTCLK
DD
A
Load
Value (Note)
N° Symbol
Parameter
Unit
Formula
138 x n x Tck
Min.
Max.
1
Tw
CEn Pulse width
n x 5.75
-
µs
EXT
Note: The value in the left hand column shows the formula used to calculate the timing minimum or maximum from the oscillator clock period,
standard timer prescaler and counter programmed values.
The value in the right hand two columns show the timing minimum and maximum for an internal clock (INTCLK) at 24MHz.
Legend:
Tck = INTCLK period = OSCIN period when OSCIN is not divided by 2;
2*OSCIN period when OSCIN is divided by 2;
OSCIN period / PLL factor when the PLL is enabled.
n = number of autoscanned channels (1 ≤ n ≤ 8)
A/D CHANNEL ENABLE TIMING
191/199
1
ETC [ ETC ]
