E
2
C
HS I
2
C-Compatible Module
2
____________________________________________________
Description of Hardware
HS I
2
C-Compatible Module Supplies
The HS I
2
C-compatible module requires two supplies.
The on-board 3.3V regulator requires an input voltage at
VIN of 4.5V to 24V (J3-5, J3-6). The module also requires
a regulated 5V logic supply (J3-7, J3-8). A Maxim μC
module normally provides both of these supplies.
EPM3256AQC208-10 PLD (Altera)
The EPM3256AQC208-10 is from Altera
’
s MAX3000A
family of PLDs. This 256 product-term device accepts
3.3V or 5V logic even when powered from a 3.3V sup-
ply. Contact Altera for any questions relating to the
PLD. See the
Component Suppliers
section for contact
information.
HS I
2
C-Compatible Module Jumpers
*
The asterisks in the tables below indicate the default
configuration.
Table 1. I
2
C-Compatible Logic-Supply
Selection
JUMPER
SHUNT POSITION
1-2
2-3*
DESCRIPTION
3.3V I
2
C-compatible interface
5V I
2
C-compatible interface
JU1
SUPPLIER
Altera
Corporation
PHONE
WEBSITE
1-800-800-3753 www.altera.com
Digital Core
Design
48-32282-8266
www.digitalcoredesign.com
Fairchild
Semiconductor
Nihon
Oscilent
Sanyo
Sumida
TDK
1-888-522-5372 www.fairchildsemi.com
81-33343-3411
www.niec.co.jp
1-949-252-0522
www.oscilent.com
1-619-661-6322
www.sanyo.com
1-847-545-6700
www.sumida.com
1-847-803-6100
www.component.tdk.com
Component Suppliers
Note:
Please indicate that you are using a Maxim part when
contacting these component suppliers.
JUMPER
SHUNT POSITION
1-2*
2-3
DESCRIPTION
Enable the crystal oscillator
Disable the crystal oscillator
JU2
Table 2. Crystal Oscillator Enable
JUMPER
SHUNT POSITION
ON
OFF*
DESCRIPTION
Do not use
Disconnect GPIOA
JU3
Table 3. GPIOA
JUMPER
SHUNT POSITION
ON
OFF*
DESCRIPTION
Do not use
Disconnect GPIOB
JU4
Table 4. GPIOB
JUMPER
SHUNT POSITION
1-2
2-3*
DESCRIPTION
Reset the PLD
Normal operation mode
JU5
Table 5. Global PLD Clear (GCLR)
JUMPER
SHUNT POSITION
DESCRIPTION
The RD line to connector J3
pin 9 (J3-9) is active high;
remove U5
The
RD
line to connector J3
pin 9 (J3-9) is active low; U5
must be present for proper
operation
ON
JU6
OFF*
Table 6. Active-High RD-Line Option
JUMPER
SHUNT POSITION
DESCRIPTION
The CS line to connector J3
pin 11 (J3-11) is active high;
remove U6
The
CS
line to connector J3
pin 11 (J3-11) is active low;
U6 must be present for
proper operation
ON
JU7
OFF*
Table 7. Active-High CS-Line Option
JUMPER
SHUNT POSITION
DESCRIPTION
The WR line to connector J3
pin 10 (J3-10) is active high;
remove U7
The
WR
line to connector J3
pin 10 (J3-10) is active low;
U7 must be present for
proper operation
ON
JU8
OFF*
Table 8. Active-High WR-Line Option