NEC 78K0/Fx2, Руководство пользователя

Страница: 20 / 83

78K0/Fx2 – CAN it!
The temperature at the sensor can be calculated from the change in the sensors resistance from the
following equation, which approximates the characteristic curve:
α ² - 4 x β + 4 x β x k
T
- α
T = 25 + ° C
2 x β
-3
α = 7,88 x 10 x K
β = 1,937 x 10 x K
k
T
=
-1
-5 -2
R
T
R
25
with:
α ² - 4 x β + 4 x β x k
T
- α
T = 25 + ° C
2 x β
-3
α = 7,88 x 10 x K
β = 1,937 x 10 x K
k
T
=
-1
-5 -2
R
T
R
25
-3
α = 7,88 x 10 x K
β = 1,937 x 10 x K
k
T
=
-1
-5 -2
R
T
R
25
with:
3.13 External LED’s D1–D4
LED’s D1 to D4 are connected to port P5 of the 78K0/FF2 device. A low signal output at each port
switches the corresponding LED on.
LED Port 78K0/FF2
D1 P50
D2 P51
D3 P52
D4 P53
Table 12: LED D1–D4 connection
20