Emerson ATCA-8310, Manual

Page: 283 / 460

CPLD and FPGA
ATCA-8310 Installation and Use (6806800M72D)
283
- Modem Control Register (MCR)
5 Stick parity
When bits 3, 4, and 5 are set, the parity bit is transmitted and
checked as cleared. When bits 3 and 5 are set and bit 4 is cleared,
the parity bit is transmitted and checked as set. If bit 5 is cleared,
stick parity is disabled.:
1: Stick parity enabled
0: Stick parity disabled 0 GPP: r/w
6 Break control bit
Bit 6 is set to force a break condition, i.e. a condition where TXD is
forced to the spacing (cleared) state. When bit 6 is cleared, the
break condition is disabled and has no affect on the transmitter
logic. It only effects TXD:
1: Break condition enabled
0: Break condition disabled 0 GPP: r/w
7 Divisor latch access bit (DLAB)
Bit 7 must be set to access the divisor latches of the baud
generator during a read or write. Bit 7 must be cleared during a
read or write to access the RBR, THR, or IER.:
1: Access to DLL and DLM registers
0: Access to RBR, THR and IER registers 0 GPP: r/w
Table 8-57 Line Control Register (LCR) (continued)
IO Address: Base + 3
Bit
Description Default Access