upd78f0134hgka1-9et-a Renesas Electronics Corporation., upd78f0134hgka1-9et-a Datasheet - Page 309

• Manufacturer Part Number: upd78f0134hgka1-9et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(2) Communication operation
(a) Format and waveform example of normal transmit/receive data
Figures 14-13 and 14-14 show the format and waveform example of the normal transmit/receive data.
1. LSB-first transmission/reception
2. MSB-first transmission/reception
One data frame consists of the following bits.
The character bit length, parity, and stop bit length in one data frame are specified by asynchronous serial
interface operation mode register 6 (ASIM6).
Whether data is communicated with the LSB or MSB first is specified by bit 1 (DIR6) of asynchronous serial
interface control register 6 (ASICL6).
Whether the T
Start bit ... 1 bit
Character bits ... 7 or 8 bits
Parity bit ... Even parity, odd parity, 0 parity, or no parity
Stop bit ... 1 or 2 bits
Start
Start
bit
bit
X
D6 pin outputs normal or inverted data is specified by bit 0 (TXDLV6) of ASICL6.
Figure 14-13. Format of Normal UART Transmit/Receive Data
D0
D7
D1
D6
CHAPTER 14 SERIAL INTERFACE UART6
D2
D5
User’s Manual U16899EJ3V0UD
D3
D4
Character bits
Character bits
1 data frame
1 data frame
D4
D3
D5
D2
D6
D1
D7
D0
Parity
Parity
bit
bit
Stop bit
Stop bit
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