Zilog Z80230 - Manual (Page 176)

SCC/ESCC
User Manual
UM010903-0515 Register Descriptions
169
Write Register 13 (Upper Byte of Baud Rate Generator Time Constant)
WR13 contains the upper byte of the time constant for the baud rate generator. Bit positions for
WR13 are displayed in Figure .
Write Register 13
Write Register 14 (Miscellaneous Control Bits)
WR14 contains some miscellaneous control bits. Bit positions for WR14 are displayed in Figure .
For DPLL function, see DPLL Digital Phase-Locked Loop on page 78 as well.
Write Register 14
D7 D6 D5 D4 D3 D2 D1 D0
Write Register 13
TC8
TC9
TC10
TC11
TC12
TC13
TC14
TC15
Upper Byte of
Time Constant
D7 D6 D5 D4 D3 D2 D1 D0
Write Register 14
0 0 0 Null Command
0 0 1 Enter Search Mode
0 1 0 Reset Missing Clock
0 1 1 Disable DPLL
1 0 0 Set Source = BR Generator
1 0 1 Set Source = /RTxC
1 1 0 Set FM Mode
1 1 1 Set NRZI Mode
BR Generator Enable
BR Generator Source
/DTR/Request Function
Auto Echo
Local Loopback