AP522 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 46 - http://www.acromag.com
- 46 -
www.acromag.com
XX00 = No receive Flow Control
XX10 = Receiver Compares Xon1/Xoff1
XX01 = Receiver Compares Xon2/Xoff2
1011 = Transmit Xon1/Xoff1, Receiver compares
Xon1 or Xon2, Xoff1 or Xoff2.
0111 = Transmit Xon2/Xoff2. Receiver compares
Xon1 or Xon2, Xoff1 or Xoff2.
1111 = Transmit Xon1 and Xon2, Xoff1 and Xoff2;
Receiver compares Xon1 and Xon2, Xoff1
and Xoff2.
0011 = No transmit flow control. Receiver
compares Xon1 and Xon2, Xoff1 and Xoff2.
4
Enhanced
Function
Control
0 = Disable and latch the Enhanced Functions: the
IER bits 4-7, ISR bits 4-5, FCR bits 4-5, MCR bits
5-7. This feature prevents existing software
from altering or overwriting the enhanced
functions.
1 = Enables the enhanced functions. Allows the
IER bits 4-7, ISR bits 4-5, FCR bits 4-5, and MCR
bits 5-7 to be modified.
5
Special
Character
Detect
Control
0 = Disable special character detect.
1 = Enable special character detect. Incoming
receive characters are compared with Xoff-2
data. If a match exists, the receive data will be
transferred to FIFO and ISR bit-4 will be set to
indicate detection of special character. Bit-0
of the Xoff/Xon registers corresponds with the
LSB bit for the receive character. When this
feature is enabled, the normal software flow
control must be disabled (EFR bits 0-3 must be
set to a logic “0”
).
6
RTS
Hardware
Flow
Control
Not supported.
7
CTS
Hardware
Flow
Control
Not Supported.
