DM336P Davicom Semiconductor Incorporated, DM336P Datasheet - Page 16

• Manufacturer Part Number: DM336P
• Manufacturer: Davicom Semiconductor Incorporated

d. DM6383 Configuration Modes
The DM6383A is power-on in jumpless mode. The
default configuration is set by loading the default
value stored in 93C46 to Auto-configuration register.
These values can be modified by software via the
logical device configuration registers in DM Jumpless
mode. This update value of new configuration is only
valid temporarily and will be lost after an active PC
Hardware Reset. Permanent changes of default
configuration will be done by informing micro-
controller to modify the content of 93C46 via Auto-
configuration Register.
The Plug and Play logic can operate through two
configuration modes: One is DM Jumpless mode, the
other, PnP mode. There are two operating methods
between the two modes: First, setting hard
configuration through Initiation Key sequences,
second, setting hard configuration according to the
register that is used, I/O Configuration Register or
Auto-configuration Register.
(1) The Initiation Key for Plug and Play
The Plug and Play logical is in sequence on powering
up and must be enabled by softwares. This is
achieved by a predefined series of writes (32 I/O
16
N O
R E A D A L L 7 2 B I T S
F R O M S E R I A L
I D E N T I F I E R
D R I V E
" A A H " O N
S D [ 7 : 0 ]
O N E C A R D
I S O L A T E D
D R I V E " 5 5 H " O N S D [ 7 : 0 ]
R E A D F R O M S E R I A L I S O L A T I O N R E G I S T E R
Y E S
A F T E R I / O R E A D C O M P L E T E S
F E T C H N E X T I D B I T F R O M
S E R I A L I D E N T I F I E R
W A I T F O R N E X T R E A D F R O M S E R I A L I S O L A T I O N R E G I S T E R
L E A V E S D [ 7 : 0 ]
I N H I G H I M P E D A N C E
V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set
Y E S
I D B I T = " 1 H "
I S O L A T I O N
S T A T E
writes) to the Address port, which is called the
Initiation Key. The proper series of the I/O writes is
detected, then the Plug and Play read/write data ports
are enabled. The Write sequence will be reset and
must be issued from the beginning if any data
mismatch occurs. The exact sequence for Initiation
Key is listed below in hexadecimal notion.
(2) PnP Initiation Key
6A, B5, DA, ED, F6, FB, 7D, BE, DF, 6F, 37, 1B, 0D,
86, C3, 61, B0, 58, 2C, 16, 8B, 45, A2, D1, E8, 74,
3A, 9D, CE, E7, 73, 39
(3) DM Initiation Key
68, 34, 1A, 8D, CB, E3, 71, B8, 5C, 2E, 97, 4B, 25,
92, C9, E4, 72, B9, DC, 6E, B7, 5B, 2D, 96, CB, 65,
B2, D9, EC, 76, BB, 5D
(4) Isolation Protocol
A simple algorithm is used to isolate each Plug and
Play card. This algorithm uses the signals on the ISA
bus and requires lock-step operation between the
Plug and Play hardware and the isolation software.
G E T O N E B I T F R O M S E R I A L I D E N T I F I E R
L E A V E S D [ 7 : 0 ]
I N H I G H - I M P E D A N C E
N O
N O
N O
S D [ 1 : 0 ] = " 0 1 "
S D [ 1 : 0 ] = " 1 0 "
S T A T E
S L E E P
Y E S
Y E S
I D = 0
O T H E R C A R D I D = 1
Version: DM336P-DS-F02
DM336P
August 15, 2000
Final