PIC17LC756-08/L Microchip Technology, PIC17LC756-08/L Datasheet - Page 78
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PIC17LC756-08/L
Manufacturer Part Number
PIC17LC756-08/L
Description
MICRO CTRL 16K LOW PWR 68PLCC
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Specifications of PIC17LC756-08/L
Core Processor
PIC
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
32KB (16K x 16)
Program Memory Type
OTP
Ram Size
902 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 6 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
Eeprom Size
-
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PIC17C7XX
10.3
PORTC is an 8-bit bi-directional port. The correspond-
ing data direction register is DDRC. A ’1’ in DDRC con-
figures the corresponding port pin as an input. A ’0’ in
the DDRC register configures the corresponding port
pin as an output. Reading PORTC reads the status of
the pins, whereas writing to PORTC will write to the port
latch. PORTC is multiplexed with the system bus.
When operating as the system bus, PORTC is the low
order byte of the address/data bus (AD7:AD0). The tim-
ing for the system bus is shown in the Electrical Speci-
fications section.
FIGURE 10-9:
DS30289B-page 78
Note:
Note: I/O pins have protection diodes to V
PORTC and DDRC Registers
This port is configured as the system bus
when the device’s configuration bits are
selected to Microprocessor or Extended
Microcontroller modes. In the two other
microcontroller modes, this port is a
general purpose I/O.
BLOCK DIAGRAM OF RC7:RC0 PORT PINS
TTL
Input
Buffer
DD
0
1
and V
Data
Port
SS
.
Q
Q
R
CK
CK
S
D
D
Example 10-3 shows an instruction sequence to initial-
ize PORTC. The Bank Select Register (BSR) must be
selected to Bank 1 for the port to be initialized. The fol-
lowing example uses the MOVLB instruction to load the
BSR register for bank selection.
EXAMPLE 10-3:
MOVLB
CLRF
MOVLW
MOVWF
1
PORTC, F
0xCF
DDRC
INSTRUCTION READ
; Select Bank 1
; Initialize PORTC data
; latches before setting
; the data direction reg
; Value used to initialize
; data direction
; Set RC<3:0> as inputs
; RC<5:4> as outputs
; RC<7:6> as inputs
INITIALIZING PORTC
DATA/ADDR_OUT
To D_Bus
2000 Microchip Technology Inc.
WR_PORTC
RD_PORTC
WR_DDRC
RD_DDRC
DRV_SYS
Data Bus
EX_EN
IR
System Bus
Control
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