TC1796
Peripheral Units (Vol. 2 of 2)
Asynchronous/Synchronous Serial Interface (ASC)
User’s Manual 19-23 V2.0, 2007-07
ASC, V2.0
FEN 6rwFraming Check Enable (asynchronous mode only)
0
B
Ignore framing errors
1
B
Check framing errors
OEN 7rwOverrun Check Enable
0
B
Ignore overrun errors
1
B
Check overrun errors
PE 8rwhParity Error Flag
Set by hardware on a parity error (PEN = 1). Must be
cleared by software.
FE 9rwhFraming Error Flag
Set by hardware on a framing error (FEN = 1). Must be
cleared by software.
OE 10 rwh Overrun Error Flag
Set by hardware on an overrun error (OEN = 1). Must be
cleared by software.
FDE 11 rw Fractional Divider Enable
0
B
Fractional divider disabled
1
B
Fractional divider is enabled and used as
prescaler for baud rate timer
(bit BRS is “don’t care”)
ODD 12 rw Parity Selection
0
B
Even parity selected (parity bit = 1 on odd number
of 1s in data, parity bit = 0 on even number of 1s
in data)
1
B
Odd parity selected (parity bit = 1 on even number
of 1s in data, parity bit = 0 on odd number of 1s in
data)
BRS 13 rw Baud Rate Selection
0
B
Baud rate timer prescaler divide-by-2 selected
1
B
Baud rate timer prescaler divide-by-3 selected
BRS is “don’t care” if FDE = 1 (fractional divider
enabled)
LB 14 rw Loopback Mode Enable
0
B
Loop-Back mode disabled
1
B
Loop-Back mode enabled
Field Bits Type Description
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