Lattice Semiconductor ispMACH 4256ZE User Manual page 7

USB port or optionally with external power. You may create or modify CPLD program files using ispLEVER Classic
software and reprogram the board using ispVM software.
Figure 3. ispMACH 4000ZE Breakout Board Block Diagram
A/Mini-B
USB Cable
USB Mini B
Socket
Table 1 describes the components on the board and the interfaces it supports.
Table 1. Breakout Board Components and Interfaces
Component/Interface
Circuits
USB Controller
USB Mini-B
Socket
Components
LC4256ZE
Interfaces
LED Array
Four 2x20 header landings
1x8 header landing
4x15 prototype area
Subsystems
This section describes the principle subsystems for the ispMACH 4256ZE Breakout Board in alphabetical order.
Clock Sources
All clocks for the counter demonstration designs originate from the ispMACH 4256ZE CPLD on-chip oscillator and
timer (OSCTIMER) block. You may use an expansion header landing to drive a CPLD input with an external clock
source.
Expansion Header Landings
The expansion header landings provide access to user GPIOs, primary inputs, clocks, and Bank 0/1 VCCO pins of
the ispMACH 4256ZE. The remaining pins serve as power supplies for external connections. Each landing is con-
figured as one 2x20 100 mil.
Table 2. Expansion Connector Reference
20 GPIO
2x20 Header
Landing (J3)
35 GPIO
2x20 Header
Landing (J4)
JTAG
Programming
USB
Controller
Type Schematic Reference
Circuit U2: FT2232H
I/O J1:USB_MINI_B
CPLD U4: LC4256ZE-5TN144C
Output D8-D1
J3: header_2x20
J4: header_2x20
I/O
J5: header_2x20
J6: header_2x20
I/O J1: header_1x8
J9
Item
Reference Designators
Part Number
ispMACH 4256ZE Breakout Board
40 GPIO
15 GPIO
ispMACH4256ZE-5T
N144C
8
8
USB-to-JTAG interface and dual USB UART/FIFO IC
Programming and debug interface
256-macrocell CPLD packaged in a 20 x 20mm,
144-pin TQFP
Red LEDs
User-definable I/O
Optional JTAG interface
Prototype area 100mil centered holes
Description
J3, J4, J5, J6
header_2x20
7
Evaluation Kit User's Guide
2x20 Header
Landing (J5)
2x20 Header
Landing (J6)
1x8 JTAG Header
Landing (J1)
LED
Array
Description