DSPIC30F4012T-20I/ML Microchip Technology, DSPIC30F4012T-20I/ML Datasheet - Page 2

• Manufacturer Part Number: DSPIC30F4012T-20I/ML
• Description: IC DSPIC MCU/DSP 48K 44QFN
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F4012T-20I/ML

• 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: 44-QFN
• For Use With: XLT44QFN4 - SOCKET TRANS ICE 28DIP TO 44QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: DSPIC30F4012T20IM

dsPIC30F4011/4012
1. Module: Data EEPROM
FIGURE 1:
EXAMPLE 1:
DS80205C-page 2
.include
.section
.align 4
.hword 0xF345
.byte
.byte
.hword 0x1234
.byte
.byte
The Most Significant bit of every fourth byte in data
EEPROM may be corrupted on any write opera-
tion. This write corruption may occur while using
either PRO MATE
Self-Programming (RTSP).
Figure 1 shows the first twelve bytes in data
EEPROM and indicates the affected bits.
Work around
Work Around 1:
Use program Flash memory instead of data
EEPROM to store constant data.
Work Around 2:
Use less than 16 bits in each word in the available
word of data EEPROM, excluding the Most
Significant bit.
Work Around 3:
Avoid using every fourth byte. Example 1 shows
how the ASM30 assembler can be used to allocate
data in the EEPROM under this constraint.
(Odd Address)
Note 1: The shaded bits labelled “B” represent the bits that may be corrupted on a write operation.
0x7FFC0B
0x7FFC01
0x7FFC03
0x7FFC05
0x7FFC07
0x7FFC09
High Byte
0x23
0xFF
0x23
0xFF
2: The memory map shown here depicts only the first twelve bytes of device EEPROM.
"p30f4012.inc"
.eedata, "r"
dsPIC30F4011/4012 DATA EEPROM
®
, MPLAB ICD 2 or Run-Time
B
B
B
15 14 13 12 11 10
;Unused byte
;Unused byte
9
8
7
6
2. Module: CPU –
EXAMPLE 2:
L0:DAW.b
L1: ....
5
The Decimal Adjust instruction, DAW.b, may
improperly clear the Carry bit, C (SR<0>), when
executed.
Work around
Check the state of the Carry bit prior to executing
the DAW.b instruction. If the Carry bit is set, set the
Carry bit again after executing the DAW.b instruc-
tion. Example 2 shows how the application should
process the Carry bit during a BCD addition
operation.
4
.include "p30f4012.inc"
.......
MOV.b
MOV.b
ADD.b
BRA
DAW.b
BSET.b SR, #C
BRA
3
2
#0x80, w0
#0x80, w1
w0, w1, w2 ;Perform addition
NC, L0
w2
L1
w2
1
0
DAW.b
© 2004 Microchip Technology Inc.
(Even Address)
;First BCD number
;Second BCD number
;If C set go to L0
;If not,do DAW and
;set the carry bit
;and exit
0x7FFC0A
0x7FFC00
0x7FFC02
0x7FFC04
0x7FFC06
0x7FFC08
Low Byte
Instruction