PC87591L datasheet(264/437 Pages) NSC

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Flash Address Register (FL_ADDR)

FL_ADDR is a shift register that enables reading from and writing to flash addresses. The address includes two fields: the

Flash Address and the Block Identifier (main block or information block). In Capture-DR state, the next address for read

and/or program is read. In case of a program or page erase fail, the offset within the section of the failing memory location

is returned. In Update-DR state, the address register is loaded with a new address. The connection of the register to the

serial chain is shown in Figure 89. The address register is reset at Power-Up and TAP resets only.

Type: R/W

Bit

Description

7-0

SID (SuperI/O Identiﬁcation). Returns the value of SID register (see “SuperI/O ID Register (SID)” on page 344)

15-8

SRID (SuperI/O Revision ID). Returns the value of SID register (see “SuperI/O Revision ID Register (SRID)” on

page 346)

31-16 Reserved.

Bit

31 30 29 28 27 26 25 24 23 2 21 20 19 18 17 16 15 14 13 12 11 10 9

876543210

Name

Block ID

Flash Address

Reset

Bit

Type

Description

27-0

R/W

Flash Address. Holds the ﬂash address in bytes, starting from address 0000016. The ﬂash last address

depends on the block size. All addresses must be word aligned. Note that the ﬁeld may hold values larger

than the actual ﬂash size. Addresses beyond the ﬂash size are reserved and should not be speciﬁed.

31-28

R/W

Block ID. Holds an ID for a speciﬁc block. The ID ﬁeld values are:

Bits

31 30 29 28

Description

0 0 0 0:

For Capture-DR, reserved; for Update-DR, no load of Address and Block ID registers (default)

0 0 0 1:

Flash Main Block

0 0 1 0:

Flash Information Block

Other:

Reserved

Figure 89. Flash Address Register

TDI

TDO

Flash Address

FL_ADDR

Block ID

PC87591L Datasheet(PDF) 264 Page - National Semiconductor (TI)

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