PIC17LC752T-08/L Microchip Technology, PIC17LC752T-08/L Datasheet - Page 80
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PIC17LC752T-08/L
Manufacturer Part Number
PIC17LC752T-08/L
Description
IC MCU OTP 8KX16 A/D 68PLCC
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Specifications of PIC17LC752T-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
16KB (8K x 16)
Program Memory Type
OTP
Ram Size
678 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC17LC752T-08/L
Manufacturer:
Microchip Technology
Quantity:
10 000
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PIC17C7XX
10.4
PORTD is an 8-bit bi-directional port. The correspond-
ing data direction register is DDRD. A ’1’ in DDRD con-
figures the corresponding port pin as an input. A ’0’ in
the DDRD register configures the corresponding port
pin as an output. Reading PORTD reads the status of
the pins, whereas writing to PORTD will write to the port
latch. PORTD is multiplexed with the system bus.
When operating as the system bus, PORTD is the high
order byte of the address/data bus (AD15:AD8). The
timing for the system bus is shown in the Electrical
Specifications section.
FIGURE 10-10:
DS30289B-page 80
Note: I/O pins have protection diodes to V
Note:
PORTD and DDRD 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 gen-
eral purpose I/O.
BLOCK DIAGRAM OF RD7:RD0 PORT PINS (IN I/O PORT MODE)
TTL
Input
Buffer
DD
0
1
and V
Port
Data
SS
.
Q
Q
R
CK
CK
S
D
D
Example 10-4 shows an instruction sequence to initial-
ize PORTD. 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 10-4:
MOVLB
CLRF
MOVLW
MOVWF
1
PORTD, F
0xCF
DDRD
INSTRUCTION READ
; Select Bank 1
; Initialize PORTD data
; latches before setting
; the data direction reg
; Value used to initialize
; data direction
; Set RD<3:0> as inputs
; RD<5:4> as outputs
; RD<7:6> as inputs
INITIALIZING PORTD
DATA/ADDR_OUT
To D_Bus
2000 Microchip Technology Inc.
WR_PORTD
RD_PORTD
WR_DDRD
RD_DDRD
DRV_SYS
Data Bus
EX_EN
IR
System Bus
Control
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