PIC18F85K22-I/PT Microchip Technology, PIC18F85K22-I/PT Datasheet - Page 121

• Manufacturer Part Number: PIC18F85K22-I/PT
• Description: IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-80
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F85K22-I/PT

• Controller Family/series: PIC18
• No. Of I/o's: 69
• Eeprom Memory Size: 1KB
• Ram Memory Size: 2KB
• Cpu Speed: 64MHz
• No. Of Timers: 8
• Core Size: 8 Bit
• Program Memory Size: 32KB
• Core Processor: PIC
• Speed: 64MHz
• Connectivity: EBI/EMI, I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

8.0
The External Memory Bus (EMB) allows the device to
access external memory devices (such as Flash,
EPROM or SRAM) as program or data memory. It
supports both 8 and 16-Bit Data Width modes and
three address widths of up to 20 bits.
TABLE 8-1:
 2009-2011 Microchip Technology Inc.
Note:
Note:
RE2/AD10
RE3/AD11
RE4/AD12
RE5/AD13
RE6/AD14
RE7/AD15
RJ3/WRH
RD0/AD0
RD1/AD1
RD2/AD2
RD3/AD3
RD4/AD4
RD5/AD5
RD6/AD6
RD7/AD7
RJ2/WRL
RE0/AD8
RE1/AD9
RH0/A16
RH1/A17
RH2/A18
RH3/A19
RJ0/ALE
RJ4/BA0
RJ1/OE
RJ5/CE
RJ7/UB
RJ6/LB
Name
EXTERNAL MEMORY BUS
The
implemented on 64-pin devices.
For the sake of clarity, only I/O port and external bus assignments are shown here. One or more additional
multiplexed features may be available on some pins.
PIC18F87K22 FAMILY EXTERNAL BUS – I/O PORT FUNCTIONS
External
Memory
PORTD
PORTD
PORTD
PORTD
PORTD
PORTD
PORTD
PORTD
PORTE
PORTE
PORTE
PORTH
PORTH
PORTH
PORTH
PORTE
PORTE
PORTE
PORTE
PORTE
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
Port
Bus
is
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
0
1
2
3
4
5
6
7
not
Address Bit 0 or Data Bit 0
Address Bit 1 or Data Bit 1
Address Bit 2 or Data Bit 2
Address Bit 3 or Data Bit 3
Address Bit 4 or Data Bit 4
Address Bit 5 or Data Bit 5
Address Bit 6 or Data Bit 6
Address Bit 7 or Data Bit 7
Address Bit 8 or Data Bit 8
Address Bit 9 or Data Bit 9
Address Bit 10 or Data Bit 10
Address Bit 11 or Data Bit 11
Address Bit 12 or Data Bit 12
Address Bit 13 or Data Bit 13
Address Bit 14 or Data Bit 14
Address Bit 15 or Data Bit 15
Address Bit 16
Address Bit 17
Address Bit 18
Address Bit 19
Address Latch Enable (ALE) Control pin
Output Enable (OE) Control pin
Write Low (WRL) Control pin
Write High (WRH) Control pin
Byte Address Bit 0 (BA0)
Chip Enable (CE) Control pin
Lower Byte Enable (LB) Control pin
Upper Byte Enable (UB) Control pin
PIC18F87K22 FAMILY
The bus is implemented with 28 pins, multiplexed
across four I/O ports. Three ports (PORTD, PORTE
and PORTH) are multiplexed with the address/data bus
for a total of 20 available lines, while PORTJ is
multiplexed with the bus control signals.
A list of the pins and their functions is provided in
Table
External Memory Bus Function
8-1.
DS39960D-page 121