Status/Clock Select Register B; Status/Clock Select Register A Format - Digital Equipment VAXstation I Service Manual

PROGRAMMING INFORHATIPN
READ:
15
08 07 06
OS
04 03 02 01 00
+· - .......... - ....... - - ........ -+·. ·+· - -+- -
·+·. ·+·. ·+· - ·+·.
·+·.
·+
not used iRXBIFERIPERIOERITXEITXRjFFL!RXRI
+· - - .... - ...... - .. - ....... - - - - . ·+·. ·+·.
·+·. ·+·. ·+·. ·+· - ·+·. ·+· -
·+
WRITE:
15 08 07 04 03 00
+· ..... - ...... - ... - . - ......... - ·+· - ...... - .....
·+· .............
·+
not used iRX CLOCK SELECTITX CLOCK SELECT!
+································+···············+···············+
ADDRESS
=
CSR BASE
+
34
Figure 2·9: Status/Clock Select Register A Format
Table 2·13: Status/Clock Select Reqister A Bits
+· •.••.• ·+· - ..... ·+· ....... - - ..... - . - - ............... - ...... - .. ·+
I BITS
! ACCESS i DESCRIPTION !
+· ...... ·+· ...... ·+· ... - .. - ...... - ... - - .. - ....... - . - . - . - ... - ... ·+
<15:08> (not used)
<07>
READ
Received break (1 •yes).
<06> READ Framing error (1 •yes).
<05> READ Parity error (1 •yes).
<04> READ Overrun error (1 •yes).
<03>
READ Transmitter empty (1 =yes).
<02> READ Transmitter ready (1 =yes).
<01>
READ FIFO full (1 =yes).
<00>
READ Receiver ready (1 =yes).
<07:04>
WRITE Receiver clock select (1001
=
4800 baud).
<03:00>
WRITE Transmitter clock select (1001
=
4800 baud).
+········+········+·············································+
2.1.6.4 Status/Clock Select Reqister B . (ADDRESS
=
CSR BASE
+
50) See Status/Clock Select Register A
2-14