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LM8500 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM8500
Description  Four Wire Resistive Touchscreen Controller with Brownout
PDF  20 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM8500 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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2.0 Pin Descriptions
Pinouts for 44- and 48-Pin Packages
Pin Name
Direction
Pin Description
44-Pin LLP
44-Pin PLCC
48-Pin TSSOP
RESET
I
Reset pin, pull low to reset
6
1
1
DTR
I
UART Data terminal ready signal, low
if not ready
72
2
WD_OUT
O
Watchdog output, tie to RESET pin
for correct function
83
3
CLK_SET
1
I
Used to set if crystal is 3.3 MHz (low)
or 10 MHz (floating or pulled high)
94
4
Unused
2
10
5
5
Unused
2
11
6
6
Unused
2
12
7
7
Unused
2
13
8
8
OSC_OUT
O
Clock oscillator output
14
9
9
OSC_IN
I
Clock oscillator input
15
10
10
Unused
2
16
11
11
Unused
2
17
12
12
UART_TX
O
UART transmit pin (inverted for use
with standard RS-232 drivers)
18
13
13
UART_RX
I
UART receive pin (inverted for use
with standard RS-232 drivers
19
14
14
SHUTDOWN
I
Shutdown pin, puts the device in halt
mode if pulled low
20
15
15
Unused
2
21
16
16
Unused
2
22
17
17
WAKE-UP
I
Used to wake up the processor from
halt mode with touch on touch screen
23
18
18
X+
I/O
Drives the X+ wire, also analog input
when sampling
24
19
19
Y-
I/O
Drives the Y- wire, also analog input
when sampling
25
20
20
X-
I/O
Drives the X- wire, also analog input
when sampling
26
21
21
Y+
I/O
Drives the Y+ wire, also analog input
when sampling
27
22
22
Unused
2
28
23
23
Unused
2
29
24
24
FILTER_OUT
O
Analog output to the filter
30
25
25
FILTER_IN
I
Analog input from the filter
31
26
26
GND
Digital ground
32
27
27
AGND
Analog ground
33
28
28
AV
CC
Analog power supply, connect to filter
for best performance
34
29
31
V
CC
Digital power supply
35
30
32
Unused
2
XX
33
Unused
2
XX
34
Unused
2
36
31
35
Unused
2
37
32
36
Unused
2
38
33
37
Unused
2
39
34
38
Unused
2
40
35
39
www.national.com
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