Zilog Z80230 - Manual (Page 190)

SCC/ESCC
User Manual
UM010903-0515 Register Descriptions
183
Read Register 6 (Not on NMOS)
Read Register 7 (Not on NMOS)
D7 D6 D5 D4 D3 D2 D1 D0
Read Register 6
*
BC0
BC1
BC2
BC3
BC4
BC5
BC6
BC7
*
Can only be accessed if the SDLC FIFO enhancement
is enabled (WR15 bit D2 set to 1)
SDLC FIFO Status and Byte Count (LSB)
D7 D6 D5 D4 D3 D2 D1 D0
Read Register 7
*
BC8
BC9
BC10
BC11
BC12
BC13
FDA: FIFO Data Available
1 = Status Reads from FIFO
0 = Status Reads from ESCC
FOS: FIFO Overflow Status
1 = FIFO Overflowed
0 = Normal
*
Can only be accessed if the SDLC FIFO enhancement
is enabled (WR15 bit D2 set to 1)
SDLC FIFO Status and Byte Count (MSB)