ACCESS-TOUCH HEXWAX, ACCESS-TOUCH Datasheet

IC, TOUCH KEY CONTROLLER, SSOP-20

ACCESS-TOUCH

Manufacturer Part Number
ACCESS-TOUCH
Description
IC, TOUCH KEY CONTROLLER, SSOP-20
Manufacturer
HEXWAX
Datasheet

Specifications of ACCESS-TOUCH

Ic Interface Type
Serial
Supply Voltage Range
2V To 5.5V
Sensor Case Style
SSOP
No. Of Pins
20
Operating Temperature Range
-40°C To +85°C
Interface Type
Serial
Package / Case
20-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Summary
AccessTouch is an integrated combination key
access controller featuring tough-sensitive keys for
vandal-proof operation. An accompanying design
blueprint is available for a complete low cost,
access control product.
AccessTouch uses capacitive touch sensing
technology.
overlaid
automatically
compensate for track capacitance, water splashes,
etc. A buzzer output provides audio feedback as
buttons are pressed.
AccessTouch is firmware for the PIC16F631
microcontroller and
programmed chip from electronics distributors or
as a firmware download from www.hexwax.com.
User Operation
When the correct code is entered, the door release
output is activated for a fixed time delay.
sequence of keys pressed prior to entering the
code is unimportant.
To change the access code, an electrical switch is
closed and the new code is entered twice. LEDs
indicate ‘Open’, ‘Closed’ and ‘Set Code’ states. All
LEDs turn off when the device enters a sleep
state.
Features
Electrical Specifications
Supply voltage Vdd
Current, sleep scan mode, 3V Vdd
Operating Temperature
p1 of 4
 Tiny volume BOM cost
 Vandal-proof design, no parts need to be
 Codes may be up to 8 digits
 Audio feedback on touch press
 Safe Controller mode available
 20-pin SSOP package
physically exposed
Table 1. Electrical Specifications
by
The PCB keyboard shown can be
a
calculates
7-Sep-08
Firmware Factory Ltd
2 Marshall St, 3
London W1F 9BB, UK
sales@firmwarefactory.com
support@firmwarefactory.com
non-metallic
is available
signal
rd
Floor
covering.
–40°C to 85°C
2.0 – 5.5 VDC
averages
as
~50μA
Access-Touch
a pre-
The
to
It
Typical Application Circuit
Touch0
Touch2
Vdd
.
.
HW140-1
BZ1
To lock
driver
. .
Vss
Vdd
R10
R8
R9
LED1-3
. .
1
4
7
0
Touch sensitive keyed access controller
.
.
AccessTouch
C2
R12
Vss
SetLED
OpenLED
ClosedLED
Lock#
Lock
Vss
2
5
8
Touch1
. .
. .
C1
.
3
6
9
1
2
R2
Access
Touch
R1
3
Touch1
Touch3
.
4
C3
5
www.firmwarefactory.com
Vss
TEAclipper
R3
connector
TouchD
TouchA
Touch3
Touch2
Touch1
Touch0
Vss
.
.
Set
R11
.. . .
. .
Typical touch
pad layout
Figure 1
.
. .
J1
Vdd
TM

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ACCESS-TOUCH Summary of contents

Page 1

... London W1F 9BB, UK sales@firmwarefactory.com support@firmwarefactory.com 7-Sep-08 covering. It averages pre- The Typical Application Circuit 2.0 – 5.5 VDC Touch0 ~50μA –40°C to 85°C Touch2 rd Floor Access-Touch AccessTouch Touch sensitive keyed access controller . Vss R12 R2 R3 BZ1 Vdd . LED1-3 Touch3 . SetLED Touch2 R8 ...

Page 2

... Set Code input control. Set to Vdd to enter a new code. The code must be entered twice and is acknowledged with a beep. This minimizes the chance of entering in an incorrect code while keeping user operation simple. It does mean, however, that codes made up of repetitive Access-Touch HW140-1 When a This provides 15 ...

Page 3

... MinLen-WaitSlp-OpBeep-OpTime-Sens (refer to table 4). enter 0300010838. Finally press OK to obtain a wanted. Avoid decryption key and to charge the TEAclipper with the decrypted firmware. Description Access-Touch Table 4. Nonvolatile Settings In EEPROM Name Default Description WaitSlp 0x00 Wait time before entering sleep mode, or zero for no ...

Page 4

... Combination Safe Controller  Touch sensitive 12-key matrix keyboard replacement Contact us for more information on these applications. Author Contact Firmware Factory Ltd 2 Marshall St, 3 London W1F 9BB, UK sales@firmwarefactory.com support@firmwarefactory.com 7-Sep-08 into the 1mm hole dia for alternate rd Floor Access-Touch HW140-1 www.firmwarefactory.com ...

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