PIC18F6585-I/PT Microchip Technology Inc., PIC18F6585-I/PT Datasheet - Page 148

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PIC18F6585-I/PT

Manufacturer Part Number
PIC18F6585-I/PT
Description
64 PIN, 48 KB FLASH, 3328 RAM, 52 I/O
Manufacturer
Microchip Technology Inc.
Datasheet

Specifications of PIC18F6585-I/PT

A/d Inputs
12-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
1024 Bytes
Input Output
53
Interface
CAN/I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
64-pin TQFP
Programmable Memory
48K Bytes
Ram Size
3.3K Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part Electrostatic Device

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Microchip Technology
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PIC18F6585/8585/6680/8680
10.8
PORTH is an 8-bit wide, bidirectional I/O port. The cor-
responding data direction register is TRISH. Setting a
TRISH bit (= 1) will make the corresponding PORTH
pin an input (i.e., put the corresponding output driver in
a high-impedance mode). Clearing a TRISH bit (= 0)
will make the corresponding PORTH pin an output (i.e.,
put the contents of the output latch on the selected pin).
Read-modify-write operations on the LATH register
read and write the latched output value for PORTH.
Pins RH7:RH4 are multiplexed with analog inputs
AN15:AN12. Pins RH3:RH0 are multiplexed with the
system bus as the external memory interface; they are
the high-order address bits, A19:A16. By default, pins
RH7:RH4 are enabled as A/D inputs and pins
RH3:RH0 are enabled as the system address bus.
Register ADCON1 configures RH7:RH4 as I/O or A/D
inputs. Register MEMCON configures RH3:RH0 as I/O
or system bus pins.
Pins RH7 and RH6 can be configured as the alternate
peripheral pins for CCP1 PWM output P1B and P1C,
respectively. This is done by clearing the configuration
bit ECCPMX, in configuration register CONFIG3H
(CONFIG3H<1>).
EXAMPLE 10-8:
DS30491C-page 146
CLRF
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
Note:
Note 1: On
2: On
PORTH, LATH and TRISH
Registers
PORTH
LATH
0Fh
ADCON1
0CFh
TRISH
PORTH is available only on PIC18F8X8X
devices.
RH7:RH4 default to A/D inputs and read
as ‘0’.
RH3:RH0 default to system bus signals.
Power-on
Power-on
INITIALIZING PORTH
; Initialize PORTH by
; clearing output
; data latches
; Alternate method
; to clear output
; data latches
;
;
; Value used to
; initialize data
; direction
; Set RH3:RH0 as inputs
; RH5:RH4 as outputs
; RH7:RH6 as inputs
Reset,
Reset,
PORTH
PORTH
pins
pins
FIGURE 10-22:
FIGURE 10-23:
Note 1: I/O pins have diode protection to V
RD LATH
WR LATH
or
PORTH
RD TRISH
RD PORTH
Note 1: I/O pins have diode protection to V
RD LATH
Data
Bus
Data
Bus
WR TRISH
WR LATH
or
PORTH
RD TRISH
RD PORTH
WR TRISH
To A/D Converter
TRIS Latch
Data Latch
TRIS Latch
Data Latch
D
D
D
D
CK
CK
CK
CK
RH3:RH0 PINS BLOCK
DIAGRAM IN I/O MODE
Q
RH7:RH4 PINS BLOCK
DIAGRAM IN I/O MODE
Q
Q
 2004 Microchip Technology Inc.
Q
Q
Q
EN
EN
Schmitt
Trigger
Input
Buffer
EN
Schmitt
Trigger
Input
Buffer
EN
D
D
DD
DD
and V
and V
I/O pin
I/O pin
SS
SS
(1)
.
.
(1)

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