PIC18F66J11-I/PT Microchip Technology, PIC18F66J11-I/PT Datasheet - Page 107

IC PIC MCU FLASH 32KX16 64TQFP

PIC18F66J11-I/PT

Manufacturer Part Number
PIC18F66J11-I/PT
Description
IC PIC MCU FLASH 32KX16 64TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr

Specifications of PIC18F66J11-I/PT

Core Size
8-Bit
Program Memory Size
64KB (32K x 16)
Core Processor
PIC
Speed
48MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
52
Program Memory Type
FLASH
Ram Size
3930 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TFQFP
Controller Family/series
PIC18
No. Of I/o's
52
Ram Memory Size
3.837890625KB
Cpu Speed
48MHz
No. Of Timers
5
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3904 B
Interface Type
EUSART, I2C, MSSP, SPI
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
52
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, DV164136, DM183032, DM183022
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 11 Channel
Package
64TQFP
Device Core
PIC
Family Name
PIC18
Maximum Speed
48 MHz
Operating Supply Voltage
1.8|2.5|3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC162091 - HEADER MPLAB ICD2 18F87J11 64/80MA180020 - MODULE PLUG-IN HPC EXPL 18F87J11AC164327 - MODULE SKT FOR 64TQFP
Eeprom Size
-
Lead Free Status / Rohs Status
 Details

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7.7
In 8-Bit Data Width mode, the external memory bus
operates only in Multiplexed mode; that is, data shares
the 8 Least Significant bits of the address bus.
Figure 7-6 shows an example of 8-Bit Multiplexed
mode for 80-pin devices. This mode is used for a single
8-bit memory connected for 16-bit operation. The
instructions will be fetched as two 8-bit bytes on a
shared data/address bus. The two bytes are sequen-
tially fetched within one instruction cycle (T
Therefore, the designer must choose external memory
devices according to timing calculations based on
1/2 T
ory speed selection, glue logic propagation delay times
must be considered, along with setup and hold times.
The Address Latch Enable (ALE) pin indicates that the
address bits, AD<15:0>, are available on the external
memory interface bus. The Output Enable signal (OE)
FIGURE 7-6:
© 2009 Microchip Technology Inc.
CY
(2 times the instruction rate). For proper mem-
8-Bit Data Width Mode
Note 1:
2:
PIC18F87J11
Upper order address bits are only used for 20-bit address width. The upper AD byte is used for all
address widths except 8-bit.
This signal only applies to table writes. See Section 6.1 “Table Reads and Table Writes”.
AD<15:8>
A<19:16>
8-BIT MULTIPLEXED MODE EXAMPLE
AD<7:0>
WRL
ALE
BA0
CE
OE
(1)
(1)
CY
).
373
PIC18F87J11 FAMILY
will enable one byte of program memory for a portion of
the instruction cycle, then BA0 will change and the
second byte will be enabled to form the 16-bit instruc-
tion word. The Least Significant bit of the address, BA0,
must be connected to the memory devices in this
mode. The Chip Enable signal (CE) is active at any
time that the microcontroller accesses external
memory, whether reading or writing. It is inactive
(asserted high) whenever the device is in Sleep mode.
This generally includes basic EPROM and Flash
devices. It allows table writes to byte-wide external
memories.
During a TBLWT instruction cycle, the TABLAT data is
presented on the upper and lower bytes of the
AD15:AD0 bus. The appropriate level of the BA0
control line is strobed on the LSb of the TBLPTR.
D<7:0>
A<19:0>
D<15:8>
Address Bus
Data Bus
Control Lines
A0
OE
A<x:1>
D<7:0>
CE
WR
DS39778D-page 107
(2)

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