R01UH0092EJ0110 Rev.1.10
Page 450 of 807
Jul 31, 2012
M16C/64C Group
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
23.1
Introduction
Each UART has a dedicated timer to generate a transmit/receive clock, and operates independently of
the others.
Table 23.1 lists UARTi Specifications (i = 0 to 2, 5 to 7). Table 23.2 lists Specification Differences between
UART0 to UART2 and UART5 to UART7. Figure 23.1 to Figure 23.3 show the block diagrams of UARTi.
Figure 23.4 shows UARTi Transmit/Receive Unit Block Diagram.
Table 23.2
Specification Differences between UART0 to UART2 and UART5 to UART7
Table 23.1
UARTi Specifications (i = 0 to 2, 5 to 7)
Item
Specification
Operational mode
•
Clock synchronous serial I/O mode
•
Clock asynchronous serial I/O mode (UART mode)
•
Special mode 1 (I
2
C mode)
The simplified I
2
C-bus interface is supported.
•
Special mode 2
The transmit/receive clock polarity and phase are selectable.
•
Special mode 3 (bus collision detection function, IE mode)
A 1-byte wave of the UART mode approximates 1-bit of the IEBus.
•
Special mode 4 (SIM mode)
Can be used with UART2. The SIM interface is supported.
Mode
UART0
UART1
UART2
UART5
UART6
UART7
Clock synchronous serial I/O mode
Available
Available
Available
Available
Clock asynchronous serial I/O mode
(UART mode)
Available
Available
Available
Available
Special mode 1 (I
2
C mode)
Available
Available
Available
Available
Special mode 2
Available
Available
Available
Available
Special mode 3 (IE mode)
Available
Available
Available
Available
Special mode 4 (SIM mode)
Not available
Available
Not available
Not available
Memory expansion mode or
microprocessor mode
Can be used
Do not use.
Summary of Contents for M16C Series
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