Sharp R-9360 Service Manual page 34

R-9360
Description
Signal
I/O
Pin No.
P2
OUT
36
Key strobe signal.
Signal applied to touch-key section.
A pulse signal is generated while 2, m
,/M.\ or
key is being touched.
OUT
37
Key strobe signal.
Signal applied to touch-key section.
A pulse signal is generated while 3, m , F] or
key is being touched.
P3
38 NC
Terminal not used.
NC
39
VREF IN Reference voltage input terminal
A reference voltage applied to the A/D converter in the LSI
The reference voltage is generally maintained at -6.2V.
IN
40
Signal coming from touch-key.
When either one of 6, 5, 4, 3, 2, 1, or 0 key is touched, a corresponding signal
out of 00 - 02 and PO - P3 will be input into KO.
When no key is touched, the signal is held at "L" level (- 12V).
KO
Kl IN 41
Signal similar to KO.
When either one of 9, 8, 7, STOP, -1 or -1
key is touched, a corresponding signal will be input into Kl .
42 K2 IN
Signal similar to KO.
When either one of m , II,
J-iiq,~, I
ml or 1 A"~~~~RT 1
key is touched, a corresponding signal will be input
in to K2.
43 K3 IN Signal similar to KO.
When either one of
key is touched, a corresponding
signal will be input into K3.
44
K4 IN Temoerature measurement inout
By inputting DC voltage corresponding to the temperature detected by the
temperature probe, this input is converted into temperature by the A/D converter
which is built in to the LSI.
45 K5 IN
Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI (lX2321YA), DC voltage in
accordance with the Model in operation is applied to set up its function.
IN
K6 46
31