ox16cf950 ETC-unknow, ox16cf950 Datasheet - Page 34

• Manufacturer Part Number: ox16cf950
• Description: Cost Asynchronous Card
• Manufacturer: ETC-unknow

It is cleared on an ISR read of a level 5 interrupt.
Level 6:
CTS or RTS changed interrupt (ISR[5:0]=’100000’):
This interrupt is set whenever either of the CTS# or RTS#
pins changes state from low to high. It is cleared on an ISR
read of a level 6 interrupt.
6.6.4
For a channel to go into sleep mode, all of the following
conditions must be met:
6.7
6.7.1
MCR[0]: DTR
logic 0
logic 1
Note that DTR# can be used for automatic out - of - band flow
control when enabled using ACR[4:3] (see section 6.11.3).
MCR[1]: RTS
logic 0
logic 1
Note that RTS# can be used for automatic out - of - band flow
control when enabled using EFR[6] (see section 6.9.4 ).
MCR[2]: OUT1
logi c 0
logic 1
OUT1# is not bonded out in the OXCF950, but is internally
used for loopback testing
MCR[3]: OUT2
logic 0
logic 1
OUT2# is not bonded out in the OXCF950, but is internally
used for loopback testing
MCR[4]: Loopback mode
logic 0
OXFORD SEMICONDUCTOR LTD.
Sleep mode enabled (IER[4]=1 in 650/950 modes, or
IER[5]=1 in 750 mode):
The transmitter is idle, i.e. the transmitter shift register
and FIFO are both empty.
SIN is high.
Modem Interface
Sleep Mode
Modem Control Register ‘MCR’
Force DTR# output to inactive (high).
Force DTR# output to active (low).
Force RTS# output to inactive (high).
Force RTS# output to active (low).
Force OUT1# output low when loopback mode
is disabled.
Force OUT1# output high.
Force OUT2# output low when loopback mode
is disabled.
Force OUT2# output high.
Normal operating mode.
A read of IER[4] (or IER[5] if a 1 was written to that bit
instead) shows whether the power-down request was
successful. The UART will fully retain its programmed state
whilst in power-down mode.
The channel will automatically exit power-down mode when
any of the conditions 1 to 7 becomes false. It may be
woken manually by clearing IER[4] (or IER[5] if
alternate sleep mode is enabled).
logic 1
In local loop-back mode, the transmitter output (SOUT) and
the modem outputs (DTR#, RTS#) are set in-active (high),
and the receiver inputs SIN, CTS#, DSR#, DCD#, and RI#
are all disabled. Internally the transmitter output is
connected to the receiver input and DTR#, RTS#, OUT1#
and OUT2# are connected to modem status inputs DSR#,
CTS#, RI# and DCD# respectively.
In this mode, the receiver and transmitter interrupts are
fully operational. The modem control interrupts are also
operational, but the interrupt sources are now t h e lower
four bits of the Modem Control Register instead of the four
modem status inputs. The interrupts are still controlled by
the IER.
MCR[5]: Enable XON-Any in Enhanced mode or enable
out-of-band flow control in non-Enhanced mode
650/950 modes (Enhanced mode):
logic 0
logic 1
In enhanced mode (EFR[4]=1), this bit enables the Xon-
Any operation. When Xon-Any is enabled, any received
data will be accepted as a valid XON (see in-band flow
control, section 6.9.3).
750 mode (Non-Enhanced mode):
logic 0
logic 1
Sleep mode operation is not available in IrDA mode.
The receiver is idle.
The receiver FIFO is empty (LSR[0]=0).
The UART is not in loopback mode (MCR[4]=0).
Changes on modem input lines have been
acknowledged (i.e. MSR[3:0]=0000).
No interrupts are pending.
CTS/RTS flow control disabled.
CTS/RTS flow control enabled.
Enable local loop-back mode (diagnostics).
XON-Any is disabled.
XON-Any is enabled.
OXCF950 DATA SHEET V1.1
Page 34
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