PIC18C242-E/SO Microchip Technology, PIC18C242-E/SO Datasheet - Page 85

• Manufacturer Part Number: PIC18C242-E/SO
• Description: IC MCU OTP 8KX16 A/D 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Cr

Specifications of PIC18C242-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: OTP
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: PIC18C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: MSSP, SPI, I2C, USART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 1 x 16 bit
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: ICE2000, DM163022, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• For Use With: I3DB18C452 - BOARD DAUGHTER ICEPIC3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: PIC18C242E/SO

8.3
PORTC is an 8-bit wide, bi-directional port. The corre-
sponding Data Direction Register is TRISC. Setting a
TRISC bit (= 1) will make the corresponding PORTC
pin an input (i.e., put the corresponding output driver in
a Hi-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 reads and writes the latched output value for
PORTC.
PORTC is multiplexed with several peripheral functions
(Table 8-5). PORTC pins have Schmitt Trigger input
buffers.
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 out-
put, while other peripherals override the TRIS bit to make
a pin an input. The user should refer to the correspond-
ing peripheral section for the correct TRIS bit settings.
FIGURE 8-7:
Note:
2001 Microchip Technology Inc.
Note 1: I/O pins have diode protection to V
PORTC, TRISC and LATC
Registers
On a Power-on Reset, these pins are con-
figured as digital inputs.
2: Port/Peripheral select signal selects between port data (input) and peripheral output.
3: Peripheral Output Enable is only active if peripheral select is active.
PORTC BLOCK DIAGRAM (PERIPHERAL OUTPUT OVERRIDE)
RD LATC
RD TRISC
Peripheral Output
Enable
RD PORTC
Peripheral Data Out
WR LATC or
WR PORTC
WR TRISC
Peripheral Data In
Port/Peripheral Select
Data Bus
(3)
DD
and V
(2)
DDR Latch
Data Latch
CK
CK
D
D
SS
.
Q
Q
Q
Q
The pin override value is not loaded into the TRIS reg-
ister. This allows read-modify-write of the TRIS register,
without concern due to peripheral overrides.
RC1 is normally configured by the configuration bit
CCP2MX as the default peripheral pin for the CCP2
module (default/erased state, CCP2MX = ‘1’).
EXAMPLE 8-3:
CLRF
CLRF
MOVLW 0xCF
MOVWF TRISC
0
1
Q
EN
D
PORTC
LATC
V
V
P
N
; 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
DD
SS
INITIALIZING PORTC
PIC18CXX2
Schmitt
Trigger
I/O pin
(1)
DS39026C-page 83