PIC18F87J50T-I/PT Microchip Technology, PIC18F87J50T-I/PT Datasheet - Page 182

• Manufacturer Part Number: PIC18F87J50T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,64PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F87J50T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 65
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3904 B
• Interface Type: I2C, MSSP, SPI, EUSART
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 65
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DM183032, DM183022, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162087 - HEADER MPLAB ICD2 18F87J50 68/84MA180021 - MODULE PLUG-IN 18F87J50 FS USBAC164328 - MODULE SKT FOR 80TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: PIC18F87J50T-I/PTTR

PIC18F87J50 FAMILY
11.3.5
Up to two chip select lines, PMCS1 and PMCS2, are
available for the Master modes of the PMP. The two
chip select lines are multiplexed with the Most Signifi-
cant bits of the address bus (PMADDRH<6> and
PMADDRH<7>). When a pin is configured as a chip
select, it is not included in any address auto-increment/
decrement. The function of the chip select signals is
configured using the chip select function bits
(PMCONL<7:6>).
11.3.6
While the module is operating in one of the Master
modes, the INCM bits (PMMODEH<3:4>) control the
behavior of the address value. The address can be
made to automatically increment or decrement after
each read and write operation. The address increments
once each operation is completed and the BUSY bit
goes to ‘0’. If the chip select signals are disabled and
configured as address bits, the bits will participate in
the increment and decrement operations; otherwise,
the CS2 and CS1 bit values will be unaffected.
11.3.7
In Master mode, the user has control over the duration
of the read, write and address cycles by configuring the
module wait states. Three portions of the cycle, the
beginning, middle and end, are configured using the
corresponding WAITBx, WAITMx and WAITEx bits in
the PMMODEL register.
The WAITB bits (PMMODEL<7:6>) set the number of
wait cycles for the data setup prior to the PMRD/PMWT
strobe in Mode 10, or prior to the PMENB strobe in
Mode 11. The WAITM bits (PMMODEL<5:2>) set the
number of wait cycles for the PMRD/PMWT strobe in
Mode 10, or for the PMENB strobe in Mode 11. When
this wait state setting is 0 then WAITB and WAITE have
no effect. The WAITE bits (PMMODEL<1:0>) define
the number of wait cycles for the data hold time after
the PMRD/PMWT strobe in Mode 10, or after the
PMENB strobe in Mode 11.
11.3.8
To perform a read on the Parallel Master Port, the user
reads the PMDIN1L register. This causes the PMP to
output the desired values on the chip select lines and
the address bus. Then the read line (PMRD) is strobed.
The read data is placed into the PMDIN1L register.
DS39775C-page 182
CHIP SELECT FEATURES
AUTO-INCREMENT/DECREMENT
WAIT STATES
READ OPERATION
If the 16-bit mode is enabled (MODE16 = 1), the read
of the low byte of the PMDIN1L register will initiate two
bus reads. The first read data byte is placed into the
PMDIN1L register, and the second read data is placed
into the PMDIN1H.
Note that the read data obtained from the PMDIN1L
register is actually the read value from the previous
read operation. Hence, the first user read will be a
dummy read to initiate the first bus read and fill the read
register. Also, the requested read value will not be
ready until after the BUSY bit is observed low. Thus, in
a back-to-back read operation, the data read from the
register will be the same for both reads. The next read
of the register will yield the new value.
11.3.9
To perform a write onto the parallel bus, the user writes
to the PMDIN1L register. This causes the module to
first output the desired values on the chip select lines
and the address bus. The write data from the PMDIN1L
register is placed onto the PMD<7:0> data bus. Then
the write line (PMWR) is strobed. If the 16-bit mode is
enabled (MODE16 = 1), the write to the PMDIN1L reg-
ister will initiate two bus writes. First write will consist of
the data contained in PMDIN1L and the second write
will contain the PMDIN1H.
11.3.10
11.3.10.1
In addition to the PMP interrupt, a BUSY bit is provided
to indicate the status of the module. This bit is only
used in Master mode. While any read or write operation
is in progress, the BUSY bit is set for all but the very last
CPU cycle of the operation. In effect, if a single-cycle
read or write operation is requested, the BUSY bit will
never be active. This allows back-to-back transfers.
While the bit is set, any request by the user to initiate a
new operation will be ignored (i.e., writing or reading
the lower byte of the PMDIN1L register will not initiate
either a read nor a write).
11.3.10.2
When the PMP module interrupt is enabled for Master
mode, the module will interrupt on every completed
read or write cycle; otherwise, the BUSY bit is available
to query the status of the module.
WRITE OPERATION
PARALLEL MASTER PORT STATUS
The BUSY Bit
INTERRUPTS
© 2009 Microchip Technology Inc.