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M
1
6
C
2 /
9
G
o r
u
p
14. Serial I/O
Note
The SI/O4 interrupt of peripheral function interrupt is not available in the 64-pin package.
Serial I/O is configured with five channels: UART0 to UART2, SI/O3 and SI/O4.
14.1 UARTi (i=0 to 2)
UARTi each have an exclusive timer to generate a transfer clock, so they operate independently of each
other.
Figure 14.1 shows the block diagram of UARTi. Figures 14.2 and 14.3 shows the block diagram of the
UARTi transmit/receive.
UARTi has the following modes:
• Clock synchronous serial I/O mode
• Clock asynchronous serial I/O mode (UART mode).
• Special mode 1 (I
• Special mode 2: UART2
• Special mode 3 (Bus collision detection function, IEBus mode): UART2
• Special mode 4 (SIM mode): UART2
Figures 14.4 to 14.9 show the UARTi-related registers.
Refer to tables listing each mode for register setting.
R
e
. v
1
1 .
2
M
r a
3 .
, 0
2
0
0
7
R
E
J
0
9
B
0
1
0
1
0 -
1
1
2
2
C bus mode): UART2
page 170
f o
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14.Serial I/O
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