IRCC2.0 SMSC Corporation, IRCC2.0 Datasheet - Page 41

• Manufacturer Part Number: IRCC2.0
• Description: Infrared Communications Controller
• Manufacturer: SMSC Corporation

frame size, 2) simplify multi-frame windowing if
the MFW bit=0 for transmit data blocks that are
larger than the maximum packet size and, 3)
constrain the SCE transmitter during loopback
testing. Note: Only the Tx Data Size register is
used for IrDA FIR loopback testing; only the Rx
Data Size register is required for Consumer IR
loopback tests. If the Tx Data Size register is
zero when the MFW bit=0, the IrDA transmit
message size is unlimited; i.e., the transmitter
will operate until the FIFO is empty. The Tx Data
Size High register is the Tx Data Size high
nibble.
Tx Data Size Low (Address 4)
The Tx Data Size Low register is the Tx Data
Size low byte.
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Rx Data Size High (Address 5)
Rx Data Size High, bits 0 - 3
The Rx Data Size register specifies the IrLAP-
negotiated maximum number of payload data
bytes per IrDA receive message frame.
register is used to check each IrDA FIR receive
frame for valid maximum data size and to
constrain the SCE receiver during Consumer IR
loopback testing. Note: Only the Rx Data Size
register is required for Consumer IR loopback
tests. If the Rx Data Size register is zero when
the MFW bit=0, the IrDA receive message size is
unlimited; i.e., a size error cannot occur because
frame size checking is disabled. The Rx Data
Size High register is the Rx Data Size high
nibble.
Rx Data Size Low (Address 6)
The Rx Data Size Low register is the Rx Data
Size low byte.
This