15
ispMACH 4000ZE Pico Development Kit
Lattice Semiconductor
User’s Guide
About PicoView Dialog
Function: Report the PicoView version.
From the LCD Display section, specify which CPLD register the LCD will display.
PicoView Control Register Dialog
Function: Specify Counter/Shift Control mode and LCD Display.
Counter / Shift Control Option
Description
Count Up/Shift Left
Specify the counter or shift register direction.
Count Down/Shift Right
Stop
Pause the counter or shift register.
From the LCD Display section, specify which CPLD register the LCD will display.
PicoView General Purpose I/O Register dialog
Function: Specify the output value registered on the LC4256ZE Bank 1 GPIOs connected to the 15x2 expansion
header landing. See Figure 10 for details.
PicoView Hex Entry Dialog
Function: User interface keypad to enter a hexadecimal value. Appears when the Counter Register button is
pressed. Allows you to specify the pre-load value for the CPLD’s counter module.
PicoView I
2
C Settings Dialog
Function: Controls the I
2
C interface between the PC and Pico board.
Option
Description
Bypass Hardware Checking
Ignore USB connections. Used for demonstrations when a Win-
dows PC with a USB port and Pico board is not available.
Enable Address Change of LC4245ZE
Enable to update how PicoView addresses the LC4256ZE.
Requires an updated LC4256ZE programming file.
I
2
C Clock Frequency
Select between I
2
C fast mode transfer rate at 400 kbit/s or 100
kbit/s.
PicoView Shift Register Dialog
Function: Specify the initial shift-register load pattern for the right-most 7-segment digit of the LCD panel.
ispMACH 4000ZE Pico Evaluation Board
This section describes the features of the ispMACH 4000ZE Pico evaluation board in detail.
Overview
The Pico board is a complete development platform for the LC4256ZE CPLD. The board includes a high-side cur-
rent sensor circuit, a Power Manager II ispPAC-POWR6AT6 mixed-signal PLD, a USB program/power port, and an
expansion header landing to support test connections. The board is powered by a 3V battery or a PC’s USB port.
You may create or modify PLD program files using ispLEVER and PAC-Designer and reprogram the board using
ispVM software.
I
2
C Address (ispPAC-POWR6AT6)
Open the PicoView Hex Entry dialog. Specify the hexadecimal value of the POWR6AT6
I
2
C bus address.
VMON1 – VMON6 radio buttons
Select the voltage monitor (VMON) to be read from the POWR6AT6 slave I
2
C peripheral.
Read (ispPAC-POWR6AT6)
Read the VMON specified and update the POWR6AT6 Register display.
Table 3. PicoView Window Buttons and Command Descriptions (Continued)
