MC68306 Motorola, MC68306 Datasheet - Page 128

• Manufacturer Part Number: MC68306
• Description: Integrated EC000 Processor
• Manufacturer: Motorola

PT—Parity Type
B/C1–B/C0—Bits per Character
6.4.1.2 MODE REGISTER 2 (DUMR2). DUMR2 controls some of the serial module
configuration. It is accessed when the channel A mode register pointer points to DUMR2,
which ocurs after any access to DUMR1. Accesses to DUMR2 do not change the pointer.
CM1–CM0—Channel Mode
These bits select a channel mode as listed in Table 6-3. See 6.3.3 Looping Modes for
more information on the individual modes.
6-20
This bit selects the parity type if parity is programmed by the parity mode bits, and if
multidrop mode is selected, it configures the transmitter for data character transmission
or address character transmission. Table 6-1 lists the parity mode and type or the
multidrop mode for each combination of the parity mode and the parity type bits.
These bits select the number of data bits per character to be transmitted. The character
length listed in Table 6-2 does not include start, parity, or stop bits.
PM1
0
0
0
0
1
1
1
DUMR2A, DUMR2B
Read/Write
RESET:
CM1
7
0
PM0
Table 6-1. PMx and PT Control Bits
0
0
1
1
0
1
1
B/C1
CM0
Table 6-2. B/Cx Control Bits
6
0
0
0
1
1
MC68306 USER'S MANUAL
Multidrop Mode
Multidrop Mode
TxRTS
Parity Mode
Force Parity
Force Parity
With Parity
With Parity
No Parity
5
0
B/C0
0
1
0
1
TxCTS
4
0
Bits/Character
SB3
3
0
Seven Bits
Eight Bits
Five Bits
Six Bits
PT
1
X
0
1
0
0
1
SB2
2
0
Address Character
SB1
Data Character
1
0
Parity Type
Even Parity
Odd Parity
High Parity
Low Parity
No Parity
SB0
0
0
MOTOROLA