Motorola MC68VZ328 用户手册
14-30
MC68VZ328 User’s Manual
Programming Model
Table 14-17. FIFO Level Marker Settings
Tx FIFO
Level
Marker
Number
of Slots
Empty
Rx FIFO
Level
Marker
Number
of Bytes
Received
0000
Disable
0000
Disable
0001
>= 4
0001
>= 4
0010
>= 8
0010
>= 8
0011
>= 12
0011
>= 12
0100
>= 16
0100
>= 16
0101
>= 20
0101
>= 20
0110
>= 24
0110
>= 24
0111
>= 28
0111
>= 28
1000
>= 32
1000
>= 32
1001
>= 36
1001
>= 36
1010
>= 40
1010
>= 40
1011
>= 44
1011
>= 44
1100
>= 48
1100
>= 48
1101
>= 52
1101
>= 52
1110
>= 56
1110
>= 56
1111
>= 60
1111
>= 60