Modem User Manual

95
FIGURE 16 - MMU PACKET NUMBER FLOW AND RELEVANT REGISTERS
T
X
F
I
F
O
C
O
M
P
L
E
T
I
O
N
F
I
F
O
R
X
F
I
F
O
C
S
M
A
/
C
D
L
O
G
I
C
A
L
A
D
D
R
E
S
S
P
A
C
K
E
T
#
M
M
U
P
H
Y
S
I
C
A
L
A
D
D
R
E
S
S
R
A
M
CPU ADDRESS
CSMA ADDRESS
RX PACKET
NUMBER
RX FIFO
PACKET NUMBER
PACKET NUMBER
REGISTER
PACK # OUT
TX DONE
PACKET NUMBER
ALLOCATION
RESULT REGISTER
ALLOCATE
RELEASE
PACK # OUT
DMA
RDWR
TX
DECODER
MMU
COMMAND REGISTER
ALLOCATE RELEASE