Mode Registers La And 2A; Mode Registers Lb And - Digital Equipment VAXstation I Service Manual

PROGRAMMING INFORMATION
Table 2·12: Mode Registers lA and 2A Bits
'"-' + - - • - • - - - + - • - • - - • - + - - - - • - - • - - - - - • - • - - - - - - - - - - - - - - - •• - - - - •• - - - - - -
+
"---
I
BITS
I ACCESS ! DESCRIPTION I
+- •• - ••. -+- - - . - - • ·+- - - - - - • - - - - - - - - - - - - - - - - •• - •• - - - •• - • - • - ••••. - -+
<15:08> (not used)
lA:
<07>
RD/WR
<06>
RD/WR
<05>
RD/WR
<04:03>
RD/WR
<02>
RD/WR
<01:00>
RD/WR
2A:
<07:06>
RD/WR
<05> RD/WR
<04>
RD/WR
<03:00> RD/WR
Rx (receive) RTS (request to send) control
( 1 • no) .
Rx interrupt select (1 •FIFO full).
Error mode (1 •block).
Parity mode (10 =no parity).
Parity type (l •odd).
Bits per character (11
=
8).
Channel mode (00 =normal).
Tx (transmit) RTS control (1 •no).
CTS (clear-to-send) enable Tx (1 •no).
Stop bit length (0111
=
1 bit).
+· .. - ... ·+·. - - - - - -+- - - - - .. - . - - - - - - - - . - - - - . - - . - - . - . - . - .. - - - . - . - . ·+
2.1.6.2 Mode Registers lB And 2B · (ADDRESS • CSR BASE
+
48) See
Mode Registers lA and 2A
2.1.6.3 Status/Clock Select Register A · This register returns
UART status information on a read, and selects the Transmit and
Receive baud rates on a write.
2-13