ADM00310 Microchip Technology, ADM00310 Datasheet - Page 8

• Manufacturer Part Number: ADM00310
• Description: BOARD EVAL FOR MCP3903 AFE
• Manufacturer: Microchip Technology
• Series: -r

Specifications of ADM00310

• Design Resources: MCP3903 Eval Brd BOM MCP3903 Eval Brd Schematic
• Main Purpose: Interface, Analog Front End (AFE)
• Embedded: Yes, MCU, 16-Bit
• Utilized Ic / Part: MCP3903, PIC24F, PIC24H, dsPIC33, MCP2200
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP2200
1.6.1.3
The ‘Rx’ in the pin name is in respect to the USB host.
The RxLED pin is an indicator for USB ‘IN’ messages.
This pin will either pulse low for a period of time
(configurable for ~100 ms or ~200 ms), or toggle to the
opposite
(IN message) by the USB host. This allows the
application to count messages or provide a visual
indication of USB traffic.
1.6.1.4
The ‘Tx’ in the pin name is in respect to the USB host.
The TxLED pin is an indicator for USB ‘OUT’
messages.
This pin will either pulse low for a period of time
(configurable for ~100 ms or ~200 ms), or toggle to the
opposite state for every message transmitted (OUT
message) by the USB host. This allows the application
to count messages or provide a visual indication of
USB traffic.
1.7
The EEPROM module is a 256 byte array of nonvolatile
memory. The memory locations are accessed for
read/write operations via USB host commands. Refer
to
ing the EEPROM. The memory cells for data EEPROM
are rated to endure thousands of erase/write cycles,
up to 100K for EEPROM.
Data retention without refresh is conservatively
estimated to be greater than 40 years.
The host should wait for the write cycle to complete and
then verify the write by reading the byte(s).
1.8
1.8.1
The RST pin provides a method for triggering an
external Reset of the device. A Reset is generated by
holding the pin low. These devices have a noise filter in
the Reset path which detects and ignores small pulses.
1.8.2
A POR pulse is generated on-chip whenever V
above a certain threshold. This allows the device to
start in the initialized state when V
operation.
To take advantage of the POR circuitry, tie the RST pin
through a resistor (1 kOhm to 10 kOhm) to V
will eliminate external RC components usually needed
to create a POR delay.
DS22228B-page 8
Section 2.0 “Configuration”
EEPROM Module
RESET/POR
state
RESET PIN
POR
RxLED Pin Function (IN Message)
TxLED Pin Function (OUT Message)
for
every
for details on access-
message
DD
is adequate for
received
DD
DD
. This
rises
When the device starts normal operation (i.e., exits the
Reset
(voltage, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are not achieved,
the device must be held in Reset until the operating
conditions are met.
1.9
The input clock must be 12 MHz to provide the proper
frequency for the USB module.
USB full-speed is nominally 12 Mb/s. The clock input
accuracy is ±0.25% (2,500 ppm maximum).
FIGURE 1-6:
FIGURE 1-7:
Note 1: A series resistor (R
2: The value of R
condition),
Oscillator
Quartz Crystal
CSTCE12M0G15L
Example: muRata
for quartz crystals with high drive level.
2 M to 10 M..
12 MHz
Resonator
12 MHz
device
QUARTZ CRYSTAL
OPERATION
CERAMIC RESONATOR
OPERATION
 2011 Microchip Technology Inc.
R
S
(1)
F
operating
is typically between
OSC1
OSC2
S
) may be required
OSC2
R
OSC1
MCP2200
MCP2200
F
(2)
parameters