Freescale Semiconductor PowerQUICC MPC885 Reference Manual page 903

1
Offset
0 1
0x2C E R
0x2E E R
• • •
• •
•
• •
•
0x3A E R
0x3C 1 1
0x3E
1
From PIP base address
Table 33-5 describes the control character table, RCCM, and RCCR fields.
Table 33-5. Control Character Table, RCCM, and RCCR Descriptions
1
Offset Bits
0x2C– 0
0x3A
1
2–7
CHARACTER n Control character values 1–8. Defines control characters to be compared to the
8–15
0x3C 0–1
2–7
8–15
Freescale Semiconductor
2
—
—
•
•
•
—
—
—
Figure 33-4. Control Character Table, RCCM, and RCCR
Name
E End of table. In tables with eight control characters, E is always 0.
0 This entry is valid.
1 The entry is not valid and is not used.
R Reject character
0 The character is not rejected but is written into the Rx buffer, which is then
closed. A new buffer is opened if more data is in the message. A maskable
interrupt is generated.
1 If this character is recognized it is written to RCCR and not to the Rx buffer. A
maskable interrupt is generated. The current Rx buffer is not closed.
— Reserved
incoming character. For characters smaller than 8 bits, the most significant bits
should be zero.
0b11 Must be set. Used to mark the end of the control character table in case eight
characters are used. Setting these bits ensures correct operation during control
character recognition.
— Reserved
RCCM Received control character mask. Used to mask the comparison of
CHARACTER n . RCCM[8–15] correspond to the eight bits of CHARACTER n and
are decoded as follows.
0 Ignore this bit when comparing the incoming character to CHARACTER n .
1 Use this bit when comparing the incoming character to CHARACTER n .
MPC885 PowerQUICC Family Reference Manual, Rev. 2
7 8
CHARACTER1
CHARACTER2
CHARACTER8
RCCM
RCCR
Description
Parallel Interface Port (PIP)
15
•
•
•
33-7