PIC24HJ12GP202-I/SS Microchip Technology, PIC24HJ12GP202-I/SS Datasheet - Page 94

• Manufacturer Part Number: PIC24HJ12GP202-I/SS
• Description: IC PIC MCU FLASH 4KX24 28SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 24Hr

Specifications of PIC24HJ12GP202-I/SS

• Program Memory Type: FLASH
• Program Memory Size: 12KB (4K x 24)
• Package / Case: 28-SSOP
• Core Processor: PIC
• Core Size: 16-Bit
• Speed: 40 MIPs
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 21
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 10x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC24HJ
• Core: PIC
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: I2C/SPI/UART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10-ch x 10-bit or 10-ch x 12-bit
• 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

PIC24HJ12GP201/202
9.1.1
In addition to the PORT, LAT and TRIS registers for
data control, some port pins can also be individually
configured for either digital or open-drain output. This
is controlled by the Open-Drain Control register,
ODCx, associated with each port. Setting any of the
bits configures the corresponding pin to act as an
open-drain output.
The open-drain feature allows the generation of
outputs higher than V
digital-only pins by using external pull-up resistors.
The maximum open-drain voltage allowed is the same
as the maximum V
Some I/O pins may have internal analog functionality
that will not be shown on the device pin diagram.
These pins must be treated as analog pins. Table 9-1
lists all available pins and their functionality.
TABLE 9-1:
EXAMPLE 9-1:
DS70282C-page 92
MOV
MOV
NOP
btss
0xFF00, W0
W0, TRISBB
PORTB, #13
I/O Pin
RB10
RB12
RB13
RB14
RB15
RB11
OPEN-DRAIN CONFIGURATION
RA0
RA1
RA2
RA3
RA4
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RB8
RB9
AVAILABLE I/O PINS AND
THEIR FUNCTIONALITY
IH
specification.
PORT WRITE/READ EXAMPLE
DD
(e.g., 5V) on any desired
Digital-Only/5V Tolerant
; Configure PORTB<15:8> as inputs
; and PORTB<7:0> as outputs
; Delay 1 cycle
; Next Instruction
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
Preliminary
9.2
The AD1PCFG and TRIS registers control the opera-
tion of the Analog-to-Digital (A/D) port pins. The port
pins that are desired as analog inputs must have their
corresponding TRIS bit set (input). If the TRIS bit is
cleared (output), the digital output level (V
will be converted.
When the PORT register is read, all pins configured as
analog input channels will read as cleared (a low level).
Pins configured as digital inputs will not convert an
analog input. Analog levels on any pin that is defined as
a digital input (including the ANx pins) can cause the
input buffer to consume current that exceeds the
device specifications.
9.2.1
One instruction cycle is required between a port
direction change or port write operation and a read
operation of the same port. Typically this instruction
would be a NOP. An example is shown in Example 9-1.
9.3
The input change notification function of the I/O ports
allows the PIC24HJ12GP201/202 devices to generate
interrupt requests to the processor 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 disabled. 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
module. 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.
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:
Configuring Analog Port Pins
Input Change Notification
I/O PORT WRITE/READ TIMING
Pull-ups on change notification pins
should always be disabled when the port
pin is configured as a digital output.
© 2008 Microchip Technology Inc.
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