TMP92CZ26A
92CZ26A-336
(2) Mode 1 (7-bit UART Mode)
7-Bit UART Mode is selected by setting the Serial Channel Mode Register
SC0MOD0<SM1:0> field to 01.
In this mode a parity bit can be added. Use of a parity bit is enabled or disabled by the
setting of the Serial Channel Control Register SC0CR<PE> bit; whether even parity
or odd parity will be used is determined by the SC0CR<EVEN> setting when
SC0CR<PE> is set to 1 (enabled).
Setting example: When transmitting data of the following format, the control
registers should be set as described below.
7 6 5 4 3
2
1
0
P9CR
←
X X X X X
−
−
1
P9FC
← −
−
X X X
−
X
1
Set P90 to function as the TXD0 pin.
SC0MOD0
←
X 0
−
X 0
1
0
1
Select 7-bit UART mode.
SC0CR
← −
1 1
−
−
−
−
−
Add even parity.
BR0CR
←
0
0
1
0
1
0
0
0
Set the transfer rate to 2400 bps.
INTES0
←
X 1 0 0 X
0
0
0
Enable the INTTX0 interrupt and set it to interrupt level 4.
SC0BUF
←
* * * * *
*
*
*
Set data for transmission.
X: Don't care,
−:
No change
(3) Mode 2 (8-Bit UART Mode)
8-Bit UART Mode is selected by setting SC0MOD0<SM1,SM0> to 10. In this mode a
parity bit can be added (use of a parity bit is enabled or disabled by the setting of
SC0CR<PE>); whether even parity or odd parity will be used is determined by the
SC0CR<EVEN> setting when SC0CR<PE> is set to 1 (enabled).
Setting example: When receiving data of the following format, the control
registers should be set as described below.
Start
Bit0 1
2
3
4
5
6
Even
parity
Transmission direction (Transmission rate: 2400 bps at f
SYS
=
19.6608 MHz)
Transmission direction (Transmission rate: 9600 bps at f
SYS
=
19.6608 MHz)
Start Bit0 1
2
3
4
5
6
Odd
parity
Stop
7