Motorola MPC823e - Page 658

Communication Processor Module
16-204 MPC823e REFERENCE MANUAL MOTOROLA
SCCs
COMMUNICATION
16
PROCESSOR MODULE
The UART transmit shift register transmits the outgoing data on the TXDx pin. Data is then
clocked synchronously with the transmit clock, which can have an internal or external
source. The RFW bit in the GSMR_H must be set for an 8-bit receive FIFO.
16.9.15.4 SCCx UART PARAMETER RAM MEMORY MAP. When configured to operate
in UART mode, the serial communication controllers overlay the structure used in
Table 16-24 with the UART-specific parameters described in Table 16-26.
Table 16-26. SCCx UART Parameter RAM Memory Map
ADDRESS NAME WIDTH DESCRIPTION
SCCx Base + 30 RES Word Reserved
SCCx Base + 34 RES Word Reserved
SCCx Base + 38 MAX_IDL Half-word Maximum Idle Characters
SCCx Base + 3A IDLC Half-word Temporary idle Counter
SCCx Base + 3C BRKCR Half-word Break Count Register (Transmit)
SCCx Base + 3E PAREC Half-word Receive Parity Error Counter
SCCx Base + 40 FRMEC Half-word Receive Framing Error Counter
SCCx Base + 42 NOSEC Half-word Receive Noise Counter
SCCx Base + 44 BRKEC Half-word Receive Break Condition Counter
SCCx Base + 46 BRKLN Half-word Last Received Break Length
SCCx Base + 48 UADDR1 Half-word UART Address Character 1
SCCx Base + 4A UADDR2 Half-word UART Address Character 2
SCCx Base + 4C RTEMP Half-word Temp Storage
SCCx Base + 4E TOSEQ Half-word Transmit Out-of-Sequence Character
SCCx Base + 50 CHARACTER1 Half-word Control Character 1
SCCx Base + 52 CHARACTER2 Half-word Control Character 2
SCCx Base + 54 CHARACTER3 Half-word Control Character 3
SCCx Base + 56 CHARACTER4 Half-word Control Character 4
SCCx Base + 58 CHARACTER5 Half-word Control Character 5
SCCx Base + 5A CHARACTER6 Half-word Control Character 6
SCCx Base + 5C CHARACTER7 Half-word Control Character 7
SCCx Base + 5E CHARACTER8 Half-word Control Character 8
SCCx Base + 60 RCCM Half-word Receive Control Character Mask
SCCx Base + 62 RCCRP Half-word Receive Control Character Register
SCCx Base + 64 RLBC Half-word Receive Last Break Character
NOTE: You are only responsible for initializing the items in bold.
SCCx base = (IMMR & 0xFFFF0000) + 0x3D00 (SCC2) and 0x3E00 (SCC3).
All references to registers in the parameter RAM table are actually implemented in the dual-port
RAM area as a memory-based register.