Transmit Command Register; Table 20-45. Tcm Register; Table 20-46. Tcm Register Definitions - Sharp Blue Treak LH75400 User Manual

LH75400/01/10/11 (Preliminary) User's Guide

20.3.2.18 Transmit Command Register

Register Bank: 1
TCM is the Transmit Command Register. The TCM Register enables or disables transmis-
sion by the transmit machine, and clears the Tx FIFO.
BIT
FIELD
RESET
RW
BIT
FIELD
RESET
RW
ADDR
NOTE: The reset value of this register's bits is indeterminate.
BITS NAME
31:4
3
2
1
0
31 30 29 28 27
— — — — —
R R R R R
15 14 13 12 11
— — — — —
R R R R R

Table 20-46. TCM Register Definitions

/// Reserved Do not modify. Read as zero.
Flush Transmit Machine
FTM
1 = Resets the transmit machine logic, except for the registers and FIFO, and
enables transmission.
Flush Transmit FIFO
FTF 1 = Clears the Tx FIFO. Data remains in the Tx FIFO until this bit is set.
The FIFO starts out flushed at reset.
Transmit Enable
TxEN
1 = Enable transmission by the transmit machine.
Transmit Disable
1 = Disables transmission. If transmission is occurring when this command is
TxDI
issued, the transmitter completes transmission of the current character be-
fore disabling transmission TxDI has priority over TxEN when controlling
transmission.

Table 20-45. TCM Register

26 25 24 23
///
— — — —
R R R R
10 9 8 7
///
— — — —
R R R R
0xFFFC2000 + 0x18
DESCRIPTION
6/17/03
22 21 20 19 18
— — — — —
R R R R R
6 5 4 3 2
FTM GRG TxEN TxDI
— — — — —
R R R W W
UART2
17 16
— —
R R
1 0
— —
W W
20-29