Datasheet

06 February 2012 Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Page 14
© 2012 Broadcom Corporation. All rights reserved
AUX_MU_LCR_REG Register (0x7E21 504C)
S
YNOPSIS The AUX_MU_LCR_REG register controls the line data format and gives access to the
baudrate register
Bit(s) Field Name Description Type Reset
31:8
Reserved, write zero, read as don’t care
7 DLAB access
If set the first to Mini UART register give access the
the Baudrate register. During operation this bit must
be cleared.
R/W 0
6 Break
If set high the UART1_TX line is pulled low
continuously. If held for at least 12 bits times that will
indicate a break condition.
R/W 0
5:1
Reserved, write zero, read as don’t care
Some of these bits have functions in a 16550
compatible UART but are ignored here
0
0 data size If clear the UART works in 7-bit mode
If set the UART works in 8-bit mode
R/W 0
AUX_MU_MCR_REG Register (0x7E21 5050)
S
YNOPSIS The AUX_MU_MCR_REG register controls the 'modem' signals.
Bit(s) Field Name Description Type Reset
31:8
Reserved, write zero, read as don’t care
7:2
Reserved, write zero, read as don’t care
Some of these bits have functions in a 16550
compatible UART but are ignored here
0
1 RTS If clear the UART1_RTS line is high
If set the UART1_RTS line is low
This bit is ignored if the RTS is used for auto-flow
control. See the Mini Uart Extra Control register
description)
R/W 0
0
Reserved, write zero, read as don’t care
This bit has a function in a 16550 compatible UART
but is ignored here
0