參數(shù)資料
型號： MB86967PFV
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces
中文描述： 1 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP80
封裝： PLASTIC, LQFP-80
文件頁數(shù)： 84/129頁
文件大小： 1499K
代理商： MB86967PFV
84
MB86967
Table 6 Control and Status Parameters
Symbol
DLC EN
Type
Register
Bit
Name
Description
DATA LINK
CONTROL
ENABLE
LOOPBACK
CONTROL
RECEIVE
BUFFER
EMPTY
RECEIVE
PACKET
LENGTH LEFT
When high, resets all buffer memory pointers and disables both the
transmitter and the receiver circuits. When low, enables buffer
memory, transmitter and receiver.
When set low, places MB86967 in internal loopback mode.
LBC
Register
Bit
Register
Bit
RBUF
EMPTY
When high, indicates that there is at least one complete packet
stored in the receive buffer, ready to read. When low, indicates there
are no packets ready to read in the receive buffer.
The number of bytes remaining in the receive packet being read from
the buffer. Calculated by the driver from the original length given by
MB86967 in the 3rd and 4th bytes of the receive packet header, less
the number of bytes already read out.
A running count of the number of packets transferred from the
receive buffer to system memory since entering the Receive Packet
Read Routine. This parameter can share the same memory location
with TX CNT, because both are not used concurrently in the same
subroutine.
The maximum number of packets that may be processed in the
Receive Packet Read Routine.before passing control to the Transmit
Packet Write Routine. This parameter can be fixed or allowed to vary
according to need. Typical range for this parameter is 15 - 32.
The number of available bytes remaining in the transmit buffer being
loaded with packets by the driver. Calculated by driver.
RPKT
LEFT
Software
Value
RX CNT
Software
Value
RECEIVE
TRANSFER
COUNT
RX MAX
Software
Value
MAXIMUM
VALUE FOR RX
CNT
TBUF
FREE
Software
Value
TRANSMIT
BUFFER FREE
SPACE
TRANSMIT
BUFFER MODE
TRANSMIT
BUFFER SIZE
TRANSMIT
BUFFER
STATUS
TBUF
MODE
TBUF SIZE
Software
Register
Bits
The configuration of the transmit buffer space, SINGLE buffer or
DUAL buffers.
The size in bytes of each transmit buffer, which depends on initial
configuration parameters for the buffer memory.
Current status of the transmit buffer available for loading packets.
Maintained by the driver.
Value
TBUF STAT
Software
Value
TBUF STAT
Empty
Value Description
Current transmit buffer available to system bus is
completely empty.
No buffer is currently available to the system bus
because a) MB86967 is in single-buffer mode and
b) the transmitter is using the buffer.
The buffer currently available to the system bus has
one or more packets in it, but may still have room for
additional packet(s).
The buffer currently available to the system bus has
one or more packets in it, and does not have room for
the next packet presented to the driver from the
transmit queue.
Busy
Standby
Full
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