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PC87393 Datasheet(PDF) 114 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87393
Description  100-Pin LPC SuperI/O Devices for Portable Applications
PDF  148 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87393 Datasheet(HTML) 114 Page - National Semiconductor (TI)

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7.0 X-Bus Extension (Continued)
114
www.national.com
7.4.3
X-Bus Select 0 Configuration Register (XZCNF0)
This register affects the mapping of modules associated with Chip Select 0, XCS0.
Location:
Offset 01h
Type:
R/W
Bit
76543210
Name
XRDY
Enable
Wait States
Enable
Indirect
Memory
Cycle
Enable
Select 0 Mapping
Reset
Strap
1
0
Strap
Bit
Description
7
XRDY Enable. Enables the use of XRDY input for devices mapped to XCS0. Reset value of this bit is defined
by the XCNF2-0 strap inputs.
0: Disabled (default for all XCNF2-0 values, except 010 or 110)
1: Enabled (default if XCNF2-0 is set to 010 or 110)
6
Wait States Enable
0: Wait states disabled
1: 8 clock cycles of wait enabled (default)
5
Indirect Memory Cycle Enable. Enable indirect memory access mechanism to generate memory transaction
on XCS0.
0: Disabled (default)
1: Enabled
4-0
Select 0 Mapping
UDIZ = User-Defined I/O Zone
-= XCS0 does not respond to this zone decode
+= XCS0 responds to this zone decode and is influenced by its setting
Bits
Function
4 3 2 1 0 KBC PM
RTC TST
UDIZ BIOS MEM
0 0 0 0 0
-
------ (default if XCNF2-0 No BIOS mode is set)
0 0 0 0 1
-
----+
- (default if XCNF2-0 selects any of the BIOS modes)
0 0 0 1 0
+
----+
-
0 0 0 1 1
+
+
---+
-
0 0 1 0 0
+
+
+
-
-
+
-
0 0 1 0 1
+
+++-
+-
0 0 1 1 0
-
-
-
-
+
+
-
0 0 1 1 1
+
+
+
-
+
+
-
0 1 0 0 0
+
+++++-
0 1 0 0 1
+
------
0 1 0 1 0
+
---+
--
0 1 0 1 1
+
+
-----
0 1 1 0 0
+
+
+
----
0 1 1 0 1
+
+
+
+
-
-
-
0 1 1 1 0
-
---+
--
0 1 1 1 1
+
++++-
-
1 0 0 0 0
+
++++-
+
1 0 0 0 1
+
-----+
1 0 0 1 0
-
-----+
1 0 0 1 1
+
+
----+
1 0 1 0 0
+
+
+
---+
1 0 1 0 1
+
+
+
+
-
-
+
1 0 1 1 0
-
---+
-+
1 0 1 1 1
+
++++++
Others
Reserved



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