DSPIC30F4012-20I/SO Microchip Technology, DSPIC30F4012-20I/SO Datasheet - Page 11

• Manufacturer Part Number: DSPIC30F4012-20I/SO
• Description: IC, DSC, 16BIT, 48KB 20MHZ, 5.5V, SOIC28
• Manufacturer: Microchip Technology
• Series: DsPIC30Fr

Specifications of DSPIC30F4012-20I/SO

• Core Frequency: 20MHz
• Embedded Interface Type: CAN, I2C, SPI, UART
• No. Of I/o's: 20
• Flash Memory Size: 48KB
• Supply Voltage Range: 2.5V To 5.5V
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 48KB (16K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Package: 28SOIC W
• Device Core: dsPIC
• Family Name: dsPIC30
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 20
• Interface Type: CAN/I2C/SPI/UART
• On-chip Adc: 6-chx10-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DSPIC30F401220ISO

16. Module: I
17. Module: I
18. Module: I
© 2008 Microchip Technology Inc.
If there are two I
them is acting as the Master receiver and the other
as the Slave transmitter. If both devices are config-
ured for 10-bit addressing mode, and have the
same value in the A10 and A9 bits of their
addresses, then when the Slave select address is
sent from the Master, both the Master and Slave
acknowledge it. When the Master sends out the
read operation, both the Master and the Slave
enter into Read mode and both of them transmit
the data. The resultant data will be the ANDing of
the two transmissions.
Work around
In all I
A10 and A9 should be different.
In 10-bit Addressing mode, some address
matches don't set the RBF flag or load the receive
register I2CxRCV, if the lower address byte
matches the reserved addresses. In particular,
these include all addresses with the form
XX0000XXXX
following exceptions:
• 001111000X
• 011111001X
• 101111010X
• 111111011X
Work around
Ensure that the lower address byte in 10-bit
Addressing mode does not match any 7-bit
reserved addresses.
When the I
slave with and address of 0x102, the I2CxRCV
register content for the lower address byte is 0x01
rather
acknowledges both address bytes.
Work around
None.
2
C devices, the addresses as well as bits
than
2
2
2
2
C
C
C
C module is configured as a 10-bit
0x02;
and
2
C devices on the bus, one of
XX1111XXXX,
however,
the
with
module
the
19. Module: I
Note:
dsPIC30F4011/4012
When the I
I2CEN bit in the I2CCON register, the dsPIC DSC
device generates a glitch on the SDA and SCL
pins. This glitch falsely indicates “Communication
Start” to all devices on the I
a bus collision in a multi-master configuration.
Additionally, when the I2CEN bit is set, the S and
P bits of the I
‘0’, respectively, which indicate a “Communication
Start” condition.
Work arounds
To avoid this issue, either of the following two work
arounds can be implemented, depending on the
application requirements.
Work around 1:
In a single-master environment, add a delay
between enabling the I
transmission. The delay should be equal to or
greater than the time it takes to transmit two data
bits.
In the multi-master configuration, in addition to the
delay, all other I
nized and wait for the I
before initiating any kind of communication.
Work around 2:
In dsPIC DSC devices in which the I
multiplexed
precedence in the use of the pin, it is possible to
avoid this glitch by enabling the higher priority
module before enabling the I
Use the following procedure to implement this
work around:
1. Enable the higher priority peripheral module
2. Set up and enable the I
Disable the higher priority peripheral module that
was enabled in step 1.
that is multiplexed on the same pins as the I
module.
Work around 2 works only for devices that
share the SDA and SCL pins with another
peripheral that has a higher precedence
over the port latch, such as the UART. The
priority is shown in the pin diagram located
in the data sheet. For example, if the SDA
and SCL pins are shared with the UART
and SPI pins, and the UART has higher
precedence on the port latch pin.
2
2
C
C module is enabled by setting the
2
with
C module are set to values ‘1’ and
2
C masters should be synchro-
other
2
2
C module and the first data
C module to be initialized
2
2
modules
C bus, and can cause
C module.
2
C module.
DS80398A-page 11
2
C module is
that
have
2
C