Microsemi ZL70550, User Manual

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ZL70550 Application Development Kit (ADK) User’s Guide
Revisio n 1 21
Figure 9 – Sample Register Access Subsection
The sample register access subsection in Figure 9 above includes:
−
Register name and address : The register name and decimal address are the
same as those given in the ZL70550 Programmer User's Guide . By double-
clicking on the register name (near the register address), more information about
the register is displayed in a pop-up window (refer to “3.3.3
Register Description
Window " on page 23 ).
−
Register bit-level access : This field allows for bit-level access to the register
value. Bits that are not valid (don't cares) for a register are grayed out and cannot
be modified. When clicking on a bit, the value toggles and turns red, indicating a
change from the current value. After all desired bit changes are made, pressing
the
W (write) button causes the new bit values to turn back to black and the new
register value is written to the ZL70550. (Refer to Note below.)
−
Register byte-level access : This field allows for byte-level access to the register
value in hexadecimal format. When clicking in this field, the current value
disappears and a new value may be written in its place. The new value turns red,
indicating a change from the current value. After the new value is entered,
pressing the
W (write) button causes the new value to turn black and the new
value is written to the ZL70550. (Refer to Note below.) The radix used to display
and enter the value is controlled by the Radix fields in the Register Controls
section (located below the tabs; refer to "3.3.2 Register Controls" on page 22 ).
−
Register read/write controls : The R and W buttons control the read and write
functions, respectively, from and to the registers. If an R or W control is grayed
out, it is an indication that its operation is not allowed for that register.
- R : Pressing the R button causes a read from the register of the ZL70550 at
the address displayed in the register name, and displays the register’s value
in both the byte- and bit-level access fields. All values are displayed in black.
- W : If the register value is changed by the user (and is therefore red in the
GUI), pressing the W button writes the new value to the register of the
ZL70550 at the address displayed in the register name, and changes the
color of the new value to black. (Refer to
Note below.)
Note: If the user wants to simultaneously change multiple registers, refer to "3.3.2 Register
Controls" on page 22 for a description of the Write All button.
Register Name and
Address
Register Bit-Level
Access
Register Byte-Level
Access
Register Read/Write
Controls