pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 81
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pc87591l-n05
Manufacturer Part Number
pc87591l-n05
Description
Lpc Mobile Embedded Controller
Manufacturer
National Semiconductor Corporation
Datasheet
1.PC87591L-N05.pdf
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Revision 1.2
4.0 Embedded Controller Modules
4.1.10 BIU Registers
For a summary of the abbreviations used for Register Type, see “Register Abbreviations and Access” on page 32.
BIU Register Map
BIU Configuration Register (BCFG)
The BCFG register controls the configuration of common features to all zones. On reset, this register is initialized to 07
Location: 00 F980
Type:
Bit
Name
Reset
7-3
Bit
0
1
2
EWR (Early Write).
0: Late write
1: Early write (default)
OBR (Observability). This bit determines if the address and status of internal accesses are observable.
0: Not observable (no toggle of external buses)
1: Observable (external bus toggle - default)
ISTL (Internal Stall). This bit determines if the internal bus is stalled while the BIU is busy.
0: Internal bus activity not stalled when BIU is busy
1: Stall internal bus activity when the external bus is busy (default)
Reserved.
R/W
16
7
0
Mnemonic
SZCFGn Static Zone Configuration
IOCFG
BCFG
BIU Configuration
I/O Zone Configuration
6
0
Reserved
5
0
(Continued)
Register Name
Description
81
4
0
3
0
ISTL
2
1
Type
R/W
R/W
R/W
OBR
1
1
www.national.com
EWR
0
1
16
.
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