DV164136 Microchip Technology, DV164136 Datasheet - Page 99

• Manufacturer Part Number: DV164136
• Description: DEVELOPMENT KIT FOR PIC18
• Manufacturer: Microchip Technology
• Series: PIC®r
• Type: MCUr

Specifications of DV164136

• Contents: Board, Cables, CDs, PICkit™ 3 Programmer, Power Supply
• Processor To Be Evaluated: PIC18F8722, PIC18F87J11
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3.3 V, 5 V
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18F8xxx
• Kit Contents: PIC18 Exp Brd PICkit 3 Cable CD PSU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PIC18F8722, PIC18F87J11
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

7.0
The External Memory Bus (EMB) allows the device to
access external memory devices (such as Flash,
EPROM, SRAM, etc.) as program or data memory. It
supports both 8-bit and 16-bit Data Width modes and
four address widths from 8 to 20 bits.
TABLE 7-1:
© 2008 Microchip Technology Inc.
Note:
Note:
RE2/AD10
RE4/AD12
RE5/AD13
RE6/AD14
RE7/AD15
RE3/AD11
RJ3/WRH
RD0/AD0
RD1/AD1
RD2/AD2
RD3/AD3
RD4/AD4
RD5/AD5
RD6/AD6
RD7/AD7
RE0/AD8
RE1/AD9
RJ2/WRL
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 External Memory Bus is not imple-
mented on PIC18F6527/6622/6627/6722
(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.
PIC18F8527/8622/8627/8722 EXTERNAL BUS – I/O PORT FUNCTIONS
PORTD
PORTD
PORTD
PORTD
PORTD
PORTD
PORTD
PORTD
PORTH
PORTH
PORTH
PORTH
PORTE
PORTE
PORTE
PORTE
PORTE
PORTE
PORTE
PORTE
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
PORTJ
Port
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
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
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 7-1.
PIC18F8722 FAMILY
External Memory Bus Function
DS39646C-page 97