Datasheet

SLDU010
TI CONFIDENTIAL – NDA Restrictions
Page 23 of 50
6.2.2 Restricted Access
As described in the PGA400-Q1 datasheet, to access some of the features in the TEST register
map, a special unlock sequence must be sent to register 0xFF. The Restricted Access button
sends this sequence to the PGA400-Q1 device.
6.3 ESFR Registers
The “ESFR” register tab only contains a grid that can be used with the functions described
before to directly manipulate the “ESFR” register space. Most of the buttons on the right half of
the GUI control bits in the ESFR register tab. These buttons will be described later.
6.4 EEPROM Registers
The EEPROM in the PGA400-Q1 is comprised of six banks of EEPROM (BANK_0 – BANK_5)
and a shared cache. In the PGA400-Q1 GUI, each EEPROM BANK is given its own grid even
though all operations are performed on the shared cache. As before, whichever BANK tab is
displayed is the EEPROM bank that will be operated on. This is achieved by updating the
EEPROM bank select bits in the TEST register space when the user selects a different
EEPROM tab. By default, BANK_0 is selected. There are also four buttons on the EEPROM
tab that will described below.
6.4.1 Auto Program EEPROM
The Auto Program EEPROM button uses the internal EEPROM charge pump and timer to
enable and then disable the EEPROM charge pump after the programming time has been met.
This button should be used if the user desires to burn the current EEPROM cache contents to
the EEPROM bank.
6.4.2 PROG_ON
The PROG_ON button is used for a manual method of programming/testing the EEPROM. The
PROG_ON button turns on the EEPROM charge pump. Since there is no timer to automatically
turn the EEPROM charge pump back off, the user must press the “PROG_OFF” button to
disable the charge-pump
6.4.3 PROG_OFF
The PROG_OFF button is used to complete a manual EEPROM programming by disabling the
EEPROM charge pump.
6.4.4 Reload CACHE
The Reload CACHE button uses TEST register 0x0D to reload the CACHE with the contents of
the selected EEPROM bank and then performs a “READ ALL” to update the grid with the
refreshed contents of the EEPROM bank.