mc68hc908ey16a Freescale Semiconductor, Inc, mc68hc908ey16a Datasheet - Page 147

• Manufacturer Part Number: mc68hc908ey16a
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

TXINV — Transmit Inversion Bit
M — Mode (Character Length) Bit
WAKE — Wakeup Condition Bit
ILTY — Idle Line Type Bit
PEN — Parity Enable Bit
Freescale Semiconductor
This read/write bit reverses the polarity of transmitted data. Reset clears the TXINV bit.
This read/write bit determines whether ESCI characters are eight or nine bits long (See
Table
bit.
This read/write bit determines which condition wakes up the ESCI: a 1 (address mark) in the MSB
position of a received character or an idle condition on the RxD pin. Reset clears the WAKE bit.
This read/write bit determines when the ESCI starts counting 1s as idle character bits. The counting
begins either after the start bit or after the stop bit. If the count begins after the start bit, then a string
of 1s preceding the stop bit may cause false recognition of an idle character. Beginning the count after
the stop bit avoids false idle character recognition, but requires properly synchronized transmissions.
Reset clears the ILTY bit.
This read/write bit enables the ESCI parity function (see
function inserts a parity bit in the MSB position (see
1 = Transmitter output inverted
0 = Transmitter output not inverted
1 = 9-bit ESCI characters
0 = 8-bit ESCI characters
1 = Address mark wakeup
0 = Idle line wakeup
1 = Idle character bit count begins after stop bit
0 = Idle character bit count begins after start bit
1 = Parity function enabled
0 = Parity function disabled
13-5).The ninth bit can serve as a receiver wakeup signal or as a parity bit. Reset clears the M
Setting the TXINV bit inverts all transmitted values including idle, break,
start, and stop bits.
M
0
1
0
0
1
1
Control Bits
PEN:PTY
0 X
0 X
1 0
1 1
1 0
1 1
MC68HC908EY16A • MC68HC908EY8A Data Sheet, Rev. 1
Table 13-5. Character Format Selection
Start Bits
1
1
1
1
1
1
Data Bits
8
9
7
7
8
8
NOTE
Character Format
Parity
None
None
Even
Even
Odd
Odd
Table
Table
Stop Bits
13-3). Reset clears the PEN bit.
1
1
1
1
1
1
13-5). When enabled, the parity
Character Length
10 bits
11 bits
10 bits
10 bits
11 bits
11 bits
I/O Registers
147