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Serial port control and status registers
638
NS9750 Hardware Reference
Serial Channel B/A/C/D Flow Control Force register
Address: 9020 0038 / 0078
9030 0038 / 0078
The Serial Channel B/A/C/D Flow Control Force register allows you to override the
normal flow of transmit data.
Register bit assignment
Bits Access Mnemonic Reset Description
D31:21 R Not used 0x000 Always read as 0x000.
D20 R TX_IDLE 0 Transmit idle
Indicates whether the transmit state machine has been
forced into an idle state by writing a 1 to the TX_DIS field
(see D17).
D19:18 R Not used 00 Always read as 00.
D17 R/W TX_DIS 0 Transmit disable
Allows you to force the transmit state machine into the
idle state. If a transmission is in progress, the current byte
will complete before the state machine moves into the idle
state.
Write a 1 to enable this feature.
Table 379: Serial Channel B/A/C/D Flow Control Force register
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Not used
Not used
TX_
IDLE
FORCE_CHAR
Not used
TX_
DIS
FORCE_
EN