upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 414

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

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Remark:
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Remark:
414
Symbol
UAnRX
Symbol
UAnTX
UARTAn receive data register (UAnRX)
The UAnRX register is an 8-bit buffer register that stores the parallel data converted by the receive
shift register.
On completion of reception of 1 byte of data, the data stored in the receive shift register is trans-
ferred to the UAnRX register.
If the data length is specified to be 7 bits and when data is received with the LSB first, the receive
data is transferred to bits 6 to 0 of the UAnRX register, and the MSB is always 0. If data is received
with the MSB first, the receive data is transferred to bits 7 to 1 of the UAnRX register, and the LSB
is always 0.
If an overrun error (UAnOVE) occurs, the receive data at that time is not transferred to the UAnRX
register.
The UAnRX register is read-only, in 8-bit units.
Reset input and setting the UAnPWR bit of the UAnCTL0 register to 0 set this register to FFH.
UARTAn transmit data register (UAnTX)
The UAnTX register is an 8-bit register that sets transmit data.
This register can be read or written in 8-bit units.
Reset input sets this register to FFH.
n = 0 to 1
n = 0 to 1
7
7
Figure 12-8: UARTAn Transmit Data Register (UAnTX) Format
Figure 12-7: UARTAn Receive Data Register (UAnRX) Format
6
6
Chapter 12 Asynchronous Serial Interface A (UARTA)
5
5
Address: UA0RX: FFFFFA06H, UA1RX: FFFFFA16H
Address: UA0TX: FFFFFA07H, UA1TX: FFFFFA17H
User’s Manual U16702EE3V2UD00
4
4
3
3
2
2
1
1
0
0
Address
Address
R/W After Reset
R/W After Reset
R/W
R
FFH
FFH