DSPIC33FJ64GP204-I/PT Microchip Technology, DSPIC33FJ64GP204-I/PT Datasheet - Page 149

• Manufacturer Part Number: DSPIC33FJ64GP204-I/PT
• Description: IC DSPIC MCU/DSP 64K 44-TQFP
• Manufacturer: Microchip Technology
• Series: dsPIC™ 33Fr

Specifications of DSPIC33FJ64GP204-I/PT

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 40 MIPs
• Connectivity: I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: AC'97, Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 13x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Core Frequency: 40MHz
• Embedded Interface Type: ECAN, I2C, SPI, UART
• No. Of I/o's: 35
• Flash Memory Size: 64KB
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DV164033 - KIT START EXPLORER 16 MPLAB ICD2DM240001 - BOARD DEMO PIC24/DSPIC33/PIC32
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

10.3
The input change notification function of the I/O ports
allows
dsPIC33FJ64GPX02/X04, and dsPIC33FJ128GPX02/
X04 devices to generate interrupt requests to the pro-
cessor in response to a change-of-state on selected
input pins. This feature can detect input change-of-
states even in Sleep mode, when the clocks are dis-
abled. Depending on the device pin count, up to 21
external signals (CNx pin) can be selected (enabled)
for generating an interrupt request on a change-of-
state.
Four control registers are associated with the CN mod-
ule. The CNEN1 and CNEN2 registers contain the
interrupt enable control bits for each of the CN input
pins. Setting any of these bits enables a CN interrupt
for the corresponding pins.
EXAMPLE 10-1:
© 2008 Microchip Technology Inc.
MOV
MOV
NOP
btss
0xFF00, W0
W0, TRISBB
PORTB, #13
Input Change Notification
the
PORT WRITE/READ EXAMPLE
dsPIC33FJ32GP302/304,
; Configure PORTB<15:8> as inputs
; and PORTB<7:0> as outputs
; Delay 1 cycle
; Next Instruction
Preliminary
Each CN pin also has a weak pull-up connected to it.
The pull-ups act as a current source connected to the
pin, and eliminate the need for external resistors when
push-button or keypad devices are connected. The
pull-ups are enabled separately using the CNPU1 and
CNPU2 registers, which contain the control bits for
each of the CN pins. Setting any of the control bits
enables the weak pull-ups for the corresponding pins.
Note:
Pull-ups on change notification pins
should always be disabled when the port
pin is configured as a digital output.
DS70292B-page 147