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Table 13-2. Boot ROM Mass Erase Data Byte Parameter Values
Device
Data Flash
UCD3138
0
UCD3138A
0
UCD3138064
0
UCD3138064A
0
UCD3138A64
0
UCD3138A64A
0
UCD3138128
0
UCD3138128A
0
(1)
These numbers also apply to the Flash Select parameter for the Boot ROM page erase command.
13.5.2 Page Erase
The Boot ROM supports the initiation of a page erase of either the Program or Data Flash through a
PMBus message. The PMBus Master initiates a PMBus write block message to the UCD3138. The
master initiates the message by sending the device address, a command byte of 0xF1, a block length of
0x4, four data bytes and a PEC byte. The first data byte selects which flash memory in which the page
erase will be performed. The next byte selects the page to be erased. Upon receipt of the page erase
message, the Boot ROM sets the appropriate control bits to initiate a page erase on the selected flash
memory. The flash control logic generates the sequencing of control signals to perform a page erase
operation. Like Mass Erase, the Page Erase command requires 20 milliseconds to complete. No PMBus
commands should be sent during this time.
For the other members of the UCD3138 family, the "flash select" parameter can have different values,
depending on which program flash block is being acted upon during the page erase. See
more details.
Start
Flash Select (0/1)
Page Select[7:0]
SNIU028A – February 2016 – Revised April 2016
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Program Flash
0x00000 to
0x08000 to
0x07FFF
0x0FFFF
1
N/A
1
N/A
1
2
1
2
1
2
1
2
1
2
1
2
Device Address & R/W (0x16)
Unused
Copyright © 2016, Texas Instruments Incorporated
0x10000 to
0x18000 to
0x17FFF
0x1FFFF
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3
4
3
4
Command Byte (0xF1)
Unused
PEC
Boot ROM and Boot Flash
Flash Functions
(1)
Comment
1 × 32k program flash block
1 × 32k program flash block
2 × 32k program flash blocks
2 × 32k program flash blocks
2 × 32k program flash blocks
2 × 32k program flash blocks
4 × 32k program flash blocks
4 × 32k program flash blocks
Table 13-2
for
Block Length (0x4)
Stop
445
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