R8C32A Datasheet, PDF (320/603 Pages) Renesas Technology Corp – MCU M16C FAMILY / R8C/Tiny SERIES

Under development ^{Preliminary specification}
Specifications in this manual are tentative and subject to change.
R8C/32A Group
21. Serial Interface (UART0)
21.2.6 UART0 Receive Buffer Register (U0RB)
Address 00A7h to 00A6h (U0RB)
Bit b7
b6
b5
b4
b3
b2
b1
b0
Symbol —
—
—
—
—
—
—
—
After Reset X
X
X
X
X
X
X
X
Bit b15
b14
b13
b12
b11
b10
b9
b8
Symbol SUM
PER
FER
OER
—
—
—
—
After Reset X
X
X
X
X
X
X
X
Bit Symbol
Bit Name
Function
R/W
b0
——
Receive data (D7 to D0)
R
b1
—
b2
—
b3
—
b4
—
b5
—
b6
—
b7
—
b8
——
Receive data (D8)
R
b9
— Nothing is assigned. If necessary, set to 0. When read, the content is undefined.
—
b10
—
b11
—
b12 OER _{Overrun error flag} ⁽¹⁾
0: No overrun error
R
1: Overrun error
b13 FER _{Framing error flag} ⁽¹⁾
0: No framing error
R
1: Framing error
b14 PER _{Parity error flag} ⁽¹⁾
0: No parity error
R
1: Parity error
b15 SUM _{Error sum flag} ⁽¹⁾
0: No error
R
1: Error
Note:
1. Bits SUM, PER, FER, and OER are set to 0 (no error) when either of the following is set:
- Bits SMD2 to SMD0 in the U0MR register are set to 000b (serial interface disabled), or
- The RE bit in the U0C1 register is set to 0 (reception disabled)
The SUM bit is set to 0 (no error) when all of bits PER, FER, and OER are set to 0 (no error).
Bits PER and FER are also set to 0 when the high-order byte of the U0RB register is read.
Always read the U0RB register in 16-bit units.
REJ09B0458-0010 Rev.0.10 Apr 01, 2008
Page 292 of 572