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M
1
6
C
2 /
6
A
G
o r
u
p
(
M
1
13. Serial I/O
Note
UART0 is not available in the 42-pin package.
Serial I/O is configured with three channels: UART0 to UART2.
13.1. UARTi (i=0 to 2)
UARTi each have an exclusive timer to generate a transfer clock, so they operate independently of each
other.
Figure 13.1.1 shows the block diagram of UARTi. Figures 13.1.2 and 13.1.3 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 13.1.4 to 13.1.9 show the UARTi-related registers.
Refer to tables listing each mode for register setting.
R
e
. v
2
0 .
0
F
e
b
1 .
, 5
2
0
0
7
R
E
J
0
9
B
0
2
0
2
0 -
2
0
0
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, A
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, B
M
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2
C bus mode) : UART2
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13. Serial I/O
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