Motorola MPC823e - Page 729

Communication Processor Module
MOTOROLA MPC823e REFERENCE MANUAL 16-275
COMMUNICATION
16
PROCESSOR MODULE
SCCs
• TXCTL_TBL—The transmit control character table stores the bit array used for the TX
control character table. Each bit corresponds to a character that must be mapped
according to RFC 1549. If the bit is set, the character corresponding to that bit is
mapped and if the bit is not set, the corresponding character is not mapped. The
transmit control character table must be initialized to zero for IrLAP.
• RXCTL_TBL—The receive control character table stores the bit array used for the RX
control character table. Each bit corresponds to a character that must be mapped
according to RFC 1549. If the bit is set, the character corresponding to that bit is
discarded if received and if the bit is not set, the corresponding character is received
normally. The receive control character table must be initialized to zero for IrLAP.
• NOF—This entry must be initialized to the number of opening flags to be transmitted at
the beginning of a frame. A value of
n corresponds to n +1 flags.
TXCTL_TBL
BYTE 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
VALUE
Ox1F Ox1E Ox1D Ox1C Ox1B Ox1A Ox19 Ox18 Ox17 Ox16 Ox15 Ox14 Ox13 Ox12 Ox11 Ox10
BYTE 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
VALUE
Ox9 Ox8 Ox7 Ox6 Ox5 Ox4 Ox3 Ox2 Ox1 Ox0 OxO5 OxO4 OxO3 OxO2 OxO1 OxOO
RXCTL_TBL
BYTE 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
VALUE
Ox1F Ox1E Ox1D Ox1C Ox1B Ox1A Ox19 Ox18 Ox17 Ox16 Ox15 Ox14 Ox13 Ox12 Ox11 Ox10
BYTE 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
VALUE
Ox9 Ox8 Ox7 Ox6 Ox5 Ox4 Ox3 Ox2 Ox1 Ox0 OxO5 OxO4 OxO3 OxO2 OxO1 OxOO