DSPIC30F5011-20E/PT Microchip Technology, DSPIC30F5011-20E/PT Datasheet - Page 7

• Manufacturer Part Number: DSPIC30F5011-20E/PT
• Description: IC,DSP,16-BIT,CMOS,TQFP,64PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F5011-20E/PT

• Rohs Compliant: YES
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: AC'97, Brown-out Detect/Reset, I²S, LVD, POR, PWM, WDT
• Number Of I /o: 52
• Program Memory Size: 66KB (22K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT64PT5 - SOCKET TRAN ICE 64MQFP/TQFPAC30F008 - MODULE SKT FOR DSPIC30F 64TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DSPIC30F5011-20E/PTG; DSPIC30F501120EPT; DSPIC30F501120EPT

5. Module: I
EXAMPLE 5:
© 2010 Microchip Technology Inc.
Data read from the I2CCON Special Function
Register may not be correct at device operation
greater than 20 MIPS for V
to 5.5V (or 10 MIPS V
3.6V).
If the dsPIC
throughput higher than 20 MIPS, the user should
incorporate the suggested work around while
reading the I2CCON SFR.
Applications that use I
Microchip’s dsPIC30F Peripheral Library, should
operate the device at 20 MIPS or less.
Work arounds
Work around 1: For Assembly Language
Source Code
When reading the I2CCON SFR, perform two
consecutive read operations of the same SFR.
The work around is demonstrated in
this example, a Memory Direct Addressing mode
is used to read the SFR. The application may use
any addressing mode to perform the read
operation. Note that interrupts must be temporarily
disabled as shown, so that the two consecutive
reads do not get interrupted.
.include “p30fxxxx.inc”
.......
PUSH
BSET
BSET
BSET
MOV
MOV
POP
SR
SR, #IPL2
SR, #IPL1
SR, #IPL0
I2CCON, W0
I2CCON, W0
SR
2
®
C
DSC device needs to operate at a
CONSECUTIVE READS
2
C software functions from
DD
; first SFR read
; second SFR read
DD
in the range of 3V to
in the range of 4.5V
Example
5. In
dsPIC30F5011/5013
Work around 2: For C Language Source Code
For C programmers, the MPLAB C30 v1.20.02
toolsuite provides a built-in function that may be
incorporated in the application source code. This
function may be used to read the I2CCON SFR.
Some examples of usage are shown in the
“readme.txt” file provided with the MPLAB C30
v1.20.02 toolsuite. The function has the following
prototype:
unsigned __builtin_readsfr(volatile void *);
The special argument is the address of a 16-bit
SFR (I2CCON in this case). This function should
only be used to read the I2CCON Special Function
Register. For example, the I2CCON register can
be read using a function call:
reg_value = __builtin_readsfr(&I2CCON);
where ‘reg_value’ is the 16-bit value read from
the SFR.
Affected Silicon Revisions
A1
X
A2
X
A3
X
A4
X
DS80453E-page 7