EVB-EMC1043C SMSC, EVB-EMC1043C Datasheet - Page 2

• Manufacturer Part Number: EVB-EMC1043C
• Description: MCU, MPU & DSP Development Tools EMC1043 Temp Sensor Eval Board
• Manufacturer: SMSC

Specifications of EVB-EMC1043C

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 1.1 (12-14-06)
1 Overview
Temp Sensor
EMC1043
EMC1063
LED7
LED6
LED8
The EMC1043/1063 are SMBus temperature sensing ICs with 1 internal and 2 external sensors in an
8 pin MSOP package. These two ICs are targeted at different applications as described in
This evaluation board (EVB) is populated with headers to connect to external diodes or CPUs. Two 1
meter long cable assemblies with 2N3904 diode-connected transistors installed are provided for
evaluation. One cable is constructed from 28AWG ribbon cable, the other is built as a 24AWG twisted
pair.
The Beta Compensation function is designed for CPU substrate diodes and is not compatible with
diode-connected transistors such as the 2N3904. For this reason, the EMC1043 default settings are
over-ridden by the Register Manager’s initialization code so that Beta Compensation is disabled. This
function can be enabled in the Beta Factor registers, 0x29 and 0x2A.
Resistance Error Correction can eliminate the affect of series resistance to provide a more accurate
temperature reading. Ideality Factor Configuration is available to accomodate remote diodes with a
wide range of ideality factors. This is especially important for microprocessors, FPGAs, and graphics
chips.
The EVB-EMC1043C and EVB-EMC1063C are USB-based platforms for evaluating the
EMC1043/1063 ICs. A block diagram of these EVBs is shown in
P1
SMBus
P6
Mini-B
USB
Designed for CPUs and GPUs which use a substrate PNP transistor for temperature sensing.
65 and 90nm process geometries are supported. The EMC1043’s default configuration enables
Beta Compensation and Resistance Error Correction (R.E.C.) on both external diodes. The
EMC1043-5 version defaults to Beta Compensation disabled. on external diode 2.
An ideal solution for AMD CPU thermal diodes, the EMC1063 may also be used with 2N3904
diode-connected transistors. The EMC1063 does not have Beta Compensation or REC features
on external diode channel 1. REC is optional for external diode 2.
Table 1.1 Application Info for Support Temperature Sensors
USB
Activity
Bridge
Activity
Figure 1.1 EMC1043/1063 EVB Block Diagram
SMBus
Bridge
Vdd
USB-
JP4
Target Application
2
Vdd
SCL
SDA
EMC1043
EMC1063
or
Figure 1.1
EVB-EMC1043C/1063C User Manual
DP1
DN1
DP2
DN2
below.
100ohm
Vbias
SMSC EMC1043/1063
JP1
Table
Remote
Remote
Diode1
Diode2
P2
P3
1.1.