M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 206

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SERIAL I/O
7.4 Clock asynchronous serial I/O (UART) mode
7–40
7.4.3 Method of transmission
Figure 7.4.3 shows an initial setting example for relevant registers when transmitting.
The difference due to selection of transfer data length (7 bits, 8 bits, or 9 bits) is only that data length.
When selecting a 7- or 8-bit data length, set the transmit data into the low-order byte of the UARTi transmit
buffer register. When selecting a 9-bit data length, set the transmit data into that low-order byte and bit
0 of that high-order byte.
Transmission is started when all of the following conditions (
Note: When the CTS function is not selected, this condition is ignored.
When using interrupts, it is necessary to set the corresponding register to enable interrupts. For details,
refer to “Chapter 4. INTERRUPTS.”
Figure 7.4.4 shows writing data after start of transmission, and Figure 7.4.5 shows detection of transmission’s
completion.
Transmit is enabled (transmit enable bit = “1”).
Transmit data is present in the UARTi transmit buffer register (transmit buffer empty flag = “0”).
CTSi pin’s input is “L” level (when CTS function selected).
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7702/7703 Group User’s Manual
to
) are satisfied: