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•
•
4)
Host Interface which includes:
•
•
5)
ATM Port Control which includes:
•
•
6)
Fast Ethernet Port Control which includes:
•
•
7)
RS232 port 1 Enable / Disable.
8)
RS232 port 2 Enable / Disable.
9)
Flash Size / Delay Identification.
10) External (off-board) tools Support which include:
•
•
•
11) S/W Option Identification.
12) ADS Revision code.
Since part of the ADS's modules are controlled by the BCSR and since they may be disabled in
favor of external hardware, the enable signals for these modules are presented at the CPM expan-
sion connectors, so that off- board hardware may be mutually-exclusive enabled with on-board
modules.
For reason to achieve maximum SW compatibility with Voyager ADS the usable control/status bits
will be populated at the corresponding addresses.
5•11•1
BCSR0 - Board Control / Status Register 0
The BCSR0 serves as a control register on the ADS. Although it resides only over D(0:7) lines of
the PPC data bus, it is accessed as a word at offset 0 from BCSR base address. It may be read
or written at any time. BCSR0 gets its defaults upon Power-On reset. BCSR0 fields are described
in
TABLE 5-9. "BCSR0 Description"
BIT
MNEMONIC
0
HOSTCSP
1
HOSTRQAC
MOTOROLA
Freescale Semiconductor, Inc.
Functional Description
Buffers Enable/Disable.
Device Reset.
Buffers Enable/Disable
Host Acknowledge Enable
Transceiver Enable / Disable
Device Reset.
Transceiver Initial Enable
Device Reset
Tool Identification
Tool Revision
Tool Status Information
below:
TABLE 5-9. BCSR0 Description
Host Chip Select Polarity. Defines the chip-select polarity for Host I/F, for
both chip-select inputs HCS1 and HCS2. When low chip-selects have
negative polarity, otherwise - positive.
Host Request or Acknowledge Select. When Host I/F supports DMA
acknowledge, this bit should be set low and high for double host request
mode. This bit allows to change direction of external buffer.
MSC8101ADS RevB User's Manual
For More Information On This Product,
Go to: www.freescale.com
Function
PON
ATT.
DEF
0
R,W
0
R,W
55
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