PC87591L datasheet(228/437 Pages) NSC

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Embedded Controller Modules (Continued)

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JTAG-Initiated Accesses

JTAG-initiated accesses for both read and write is restricted based on the value held in the Flash Contents Protect field of

the protection word.

When any bit in the Flash Contents Protect field is 0, no reads or writes are allowed. In OBD or DEV environment, the device

remains reset until a special erase is performed. The only operation allowed in this case is a special erase of the flash con-

tents.

When all bits in the Flash Contents Protect field are 1, all flash operations are allowed. The entire flash may be read, and

except for the Factory Parameters page Of the Information Block, the entire flash may be erased and programed.

Parallel Flash Interface-Initiated Accesses

Parallel Flash interface-initiated accesses are subject to the same protection scheme as JTAG-initiated accesses. When

any bit in the Flash Contents Protect field is 0, only special erase operations are allowed and all other flash access opera-

tions are ignored.

See also Section 4.16.5 on page 226.

4.16.7 Flash Interface Registers

For a summary of the abbreviations used for Register Type, see “Register Abbreviations and Access” on page 34.

Information Block Access Index Register (IBAI)

This register defines the address bits 7-0 for read or write transaction to the Information Block.

Location: 00 F88016

Type: R/W

Table 34. Flash Interface Register Map

Mnemonic

Type

IBAI

Information Block Access Index

R/W

IBD

Information Block Data

R/W

FCWP0

Flash Core Write Protect

R/W

FLCR

Flash Memory Control

R/W

FLSR

Flash Memory Status

R/W1C

FLPSLR

Flash Memory Pre-Scaler

R/W

FLSTART

Flash Memory Start Time

R/W

FLTRAN

Flash Memory Transition Time

R/W

FLPROG

Flash Memory Program Time

R/W

FLPERASE

Flash Memory Page Erase Time

R/W

FLSERASE

Flash Memory Section Erase Time

R/W

FLEND

Flash Memory End Time

R/W

FLSEND

Flash Memory Section Erase End Time

R/W

FLRCV

Flash Memory Recovery Time

R/W

Bit

9876543210

Name

Reserved

Indirect Memory Address 7-0

Bit

Description

7-0

Index Address 7-0. The address is of a byte address in the ﬂash Information Block. Access to words is allowed

only to word-aligned addresses.

15-8

Reserved.

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