Panasonic MN101C00 - Manual (Page 116)

Chapter 5 Serial Functions
102
(7) If parity is enabled by the SC0NPE flag of the SC0MD2 register, set the
SC0PM1~0 flags of the SC0MD2 register to specify the added parity bit.
(8) Set the SC0FM1 to 0 flags of the SC0MD2 register to specify the frame
mode.
(9) Set the SC0BRKE flag of the SC0MD2 register to control break status
transmission.
(10) Select the SC0SBOM flag of the SC0MD3 register.
(11) Select the SC0IOM flag of the SC0MD3 register.
(12) Set bit 0 of the port 0 direction control register (P0DIR) to the output mode.
(13) Select serial communication by setting the SC0SBOS flag of the SC0MD3
register to "1."
(14) Set transmit data to serial interface 0 transmit/receive shift register
(SC0TRB). This will start the serial transmission.
(15) When the serial transmission begins, the SC0BSY flag of the SC0CTR
register is set to "1," indicating that a serial transfer is in progress.
(16) When the serial transmission is complete, the SC0BSY flag of the SC0CTR
register is cleared to "0" and the SC0 transfer complete interrupt request flag
is set to "1." The SC0TRI flag of the SC0MD1 register is cleared to "0."
Figure 5-3-1 UART Transmission Timing
Half-duplex UART Serial Interface
Serial interface 0 begins
operation when the SC0SBOS
flag or the SC0SBIS flag is set
to "1." Set the SC0SBOS flag
or the SC0SBIS flag after all
conditions have been set.
TXD
Parity enabled
Parity disabled
Parity
bit
Stop
bit
Stop
bit
Stop
bit
Stop
bit
SC0BSY
Parity disabled
SC0BSY
Parity enabled
Interrupt
Parity disabled
Interrupt
Parity enabled
TXD