UPD78F1502AGK-GAK-AX Datasheet, PDF (539/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
UART performs the following four types of communication operations.
• UART transmission
(See 14.6.1.)
• UART reception
(See 14.6.2.)
• LIN transmission (UART3 only) (See 14.6.3.)
• LIN reception (UART 3 only) (See 14.6.4.)
14.6.1 UART transmission
UART transmission is an operation to transmit data from the 78K0R/Lx3 microcontrollers to another device
asynchronously (start-stop synchronization).
Of two channels used for UART, the even channel is used for UART transmission.
UART
Target channel
Pins used
Interrupt
Error detection flag
Transfer data length
Transfer rate
Data phase
Parity bit
Stop bit
Data direction
UART0
UART1
UART2
UART3
Channel 0 of SAU0
Channel 2 of SAU0
Channel 0 of SAU1
Channel 2 of SAU1
TxD0
TxD1
TxD2
TxD3
INTST0
INTST1
INTST2
INTST3
Transfer end interrupt (in single-transfer mode) or buffer empty interrupt (in continuous transfer mode)
can be selected.
None
5, 7, or 8 bits
Max. fMCK/6 [bps] (SDRmn [15:9] = 2 or more), Min. fCLK/(2 × 2¹¹ × 128) [bps] ^Note
Forward output (default: high level)
Reverse output (default: low level)
The following selectable
• No parity bit
• Appending 0 parity
• Appending even parity
• Appending odd parity
The following selectable
• Appending 1 bit
• Appending 2 bits
MSB or LSB first
Note Use this operation within a range that satisfies the conditions above and the AC characteristics in the electrical
specifications (see CHAPTER 31 ELECTRICAL SPECIFICATIONS).
Remarks 1. fMCK: Operation clock (MCK) frequency of target channel
fCLK: System clock frequency
2. For 78K0R/LF3, UART0 is not mounted.
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011