PIC18F2221-E/SO Microchip Technology, PIC18F2221-E/SO Datasheet - Page 117

• Manufacturer Part Number: PIC18F2221-E/SO
• Description: 4KB, Flash, 512bytes-RAM, 25I/O, 8-bit Family,nanoWatt 28 SOIC .300in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2221-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.3
PORTC is an 8-bit wide, bidirectional port. The
corresponding Data Direction register is TRISC. Set-
ting a TRISC bit (= 1) will make the corresponding
PORTC pin an input (i.e., put the corresponding output
driver in a High-Impedance mode). Clearing a TRISC
bit (= 0) will make the corresponding PORTC pin an
output (i.e., put the contents of the output latch on the
selected pin).
The Data Latch register (LATC) is also memory
mapped. Read-modify-write operations on the LATC
register read and write the latched output value for
PORTC.
PORTC is multiplexed with several peripheral functions
(Table 11-5). The pins have Schmitt Trigger input
buffers. RC1 is normally configured by Configuration
bit, CCP2MX, as the default peripheral pin of the CCP2
module (default/erased state, CCP2MX = 1).
When enabling peripheral functions, care should be
taken in defining TRIS bits for each PORTC pin. Some
peripherals override the TRIS bit to make a pin an output,
while other peripherals override the TRIS bit to make a
pin an input. The user should refer to the corresponding
peripheral section for additional information.
© 2009 Microchip Technology Inc.
PORTC, TRISC and LATC
Registers
PIC18F2221/2321/4221/4321 FAMILY
The contents of the TRISC register are affected by
peripheral overrides. Reading TRISC always returns
the current contents, even though a peripheral device
may be overriding one or more of the pins.
EXAMPLE 11-3:
CLRF
CLRF
MOVLW
MOVWF
Note:
PORTC
LATC
0CFh
TRISC
On a Power-on Reset, these pins are
configured as digital inputs.
; Initialize PORTC by
; clearing output
; data latches
; Alternate method
; to clear output
; data latches
; Value used to
; initialize data
; direction
; Set RC<3:0> as inputs
; RC<5:4> as outputs
; RC<7:6> as inputs
INITIALIZING PORTC
DS39689F-page 117