Datasheet

 2015 Microchip Technology Inc. Preliminary DS60001320B-page 385
PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
24.0 EXTERNAL BUS INTERFACE
(EBI)
The External Bus Interface (EBI) module provides a
high-speed, convenient way to interface external
parallel memory devices to the PIC32MZ EF family
device.
With the EBI module, it is possible to connect
asynchronous SRAM and NOR Flash devices, as well
as non-memory devices such as camera sensors and
LCDs.
The features of the EBI module depend on the pin
count of the PIC32MZ EF device, as shown in
Table 24-1.
TABLE 24-1: EBI MODULE FEATURES
FIGURE 24-1: EBI SYSTEM BLOCK DIAGRAM
Note: This data sheet summarizes the features
of the PIC32MZ EF family of devices. It is
not intended to be a comprehensive
reference source. To complement the
information in this data sheet, refer to
Section 47. “External Bus Interface
(EBI)” in the “PIC32 Family Reference
Manual”
, which is available from the
Microchip web site (www.microchip.com/
PIC32).
Note: The EBI module is not available on 64-pin
devices.
Feature
Number of Device
Pins
100 124 144
Async SRAM Y Y Y
Async NOR Flash Y Y Y
Available address lines 20 20 24
8-bit data bus support Y Y Y
16-bit data bus support Y Y Y
Available Chip Selects 1 1 4
Timing mode sets 3 3 3
8-bit R/W from 16-bit bus N N Y
Non-memory device Y Y Y
LCD Y Y Y
Note: Once the EBI module is configured, exter-
nal devices will be memory mapped and
can be access from KSEG2 memory
space (see
Figure 4-1 through Figure 4-4
in Section 4.0 “Memory Organization”
for more information). The MMU must be
enabled and the TLB must be set up to
access this memory (refer to Section 50.
“CPU for Devices with MIPS32
®
microAptiv™ and M-Class Cores”
(DS60001192) of the “PIC32 Family
Reference Manual” for more information).
Control Registers
Address Decoder
Static Memory Controller
Control
Registers
Data
FIFO
Address
FIFO
System
Bus
Bus Interface Memory Interface
External Bus Interface
SYSCLK
EBIA<23:0>
EBID<15:0>
EBIBS<1:0>
EBICS<3:0>
EBIOE
EBIRP
EBIWE
EBIRDY<3:1>