LM8500HVA9 National Semiconductor, LM8500HVA9 Datasheet - Page 5

• Manufacturer Part Number: LM8500HVA9
• Description: IC TOUCHSCREEN CONTROLLER 44PLCC
• Manufacturer: National Semiconductor
• Type: Resistiver

Specifications of LM8500HVA9

• Touch Panel Interface: 4-Wire
• Number Of Inputs/keys: 1 TSC
• Resolution (bits): 10 b
• Data Interface: UART
• Data Rate/sampling Rate (sps, Bps): 38.4k
• Voltage - Supply: 2.7 V ~ 5.5 V
• Current - Supply: 11.5mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Voltage Supply Source: Single Supply
• For Use With: LM8500-REF-01 - BOARD EVALUATION LM8500
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Sampling Rate (per Second): -
• Other names: *LM8500HVA9

RESET
DTR
WD_OUT
CLK_SET
Unused
Unused
Unused
Unused
OSC_OUT
OSC_IN
Unused
Unused
UART_TX
UART_RX
SHUTDOWN
Unused
Unused
WAKE-UP
X+
Y-
X-
Y+
Unused
Unused
FILTER_OUT
FILTER_IN
GND
AGND
AV
V
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
CC
6.0 Pin Descriptions
CC
Pin Name
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
Direction
I/O
I/O
I/O
I/O
O
O
O
O
I
I
I
I
I
I
I
I
Reset pin, pull low to reset
UART data terminal ready signal
Watchdog output, tie to RESET pin
for correct function
Used to set if crystal is 3.3 MHz (low)
or 10 MHz (floating or pulled high)
Clock oscillator output
Clock oscillator input
UART transmit pin (inverted for use
with standard RS-232 drivers)
UART receive pin (inverted for use
with standard RS-232 drivers
Shutdown pin, puts the device in halt
mode if pulled low
Used to wake up the processor from
halt mode with touch on touch screen
Drives the X+ wire, also analog input
when sampling
Drives the Y- wire, also analog input
when sampling
Drives the X- wire, also analog input
when sampling
Drives the Y+ wire, also analog input
when sampling
Analog output to the filter
Analog input from the filter
Digital ground
Analog ground
Analog power supply, connect to filter
for best performance
Digital power supply
Pinouts for 44- and 48-Pin Packages
Pin Description
5
44-Pin LLP
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
X
X
6
7
8
9
44-Pin PLCC 48-Pin TSSOP
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
11
X
X
1
2
3
4
5
6
7
8
9
www.national.com
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9