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(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:
Start
Bit0
Transmission direction (Transmission rate: 2400 bps at f
7
6
5
← X
P9CR
X
X
← −
−
P9FC
X
← X
−
SC0MOD0
0
← −
SC0CR
1
1
← 0
BR0CR
0
1
← X
INTES0
1
0
← *
SC0BUF
*
*
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:
Start
Bit0
Transmission direction (Transmission rate: 9600 bps at f
When transmitting data of the following format, the control
registers should be set as described below.
2
1
3
4
4
3
2
1
0
−
−
X
X
1
Set P90 to function as the TXD0 pin.
−
X
X
X
1
X
0
1
0
1
Select 7-bit UART mode.
−
−
−
−
−
Add even parity.
0
1
0
0
0
Set the transfer rate to 2400 bps.
0
X
0
0
0
Enable the INTTX0 interrupt and set it to interrupt level 4.
*
*
*
*
*
Set data for transmission.
When receiving data of the following format, the control
registers should be set as described below.
1
2
3
4
92CZ26A-336
Even
5
6
parity
= 19.6608 MHz)
SYS
Odd
5
6
7
Stop
parity
SYS
TMP92CZ26A
= 19.6608 MHz)
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