upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 229

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(2) Asynchronous serial interface reception error status register 6 (ASIS6)
Address: FF53H After reset: 00H R
Cautions 1. The operation of the PE6 bit differs depending on the set values of the PS61 and PS60 bits of
Symbol
ASIS6
This register indicates an error status on completion of reception by serial interface UART6. It includes three
error flag bits (PE6, FE6, OVE6).
This register is read-only by an 8-bit memory manipulation instruction.
Reset signal generation sets this register to 00H if bit 7 (POWER6) and bit 5 (RXE6) of ASIM6 = 0. 00H is read
when this register is read. If a reception error occurs, read ASIS6 and then read receive buffer register 6 (RXB6)
to clear the error flag.
Figure 10-3. Format of Asynchronous Serial Interface Reception Error Status Register 6 (ASIS6)
2. The first bit of the receive data is checked as the stop bit, regardless of the number of stop
3. If an overrun error occurs, the next receive data is not written to receive buffer register 6
4. If data is read from ASIS6, a wait cycle is generated.
OVE6
asynchronous serial interface operation mode register 6 (ASIM6).
bits.
(RXB6) but discarded.
CAUTIONS FOR WAIT.
PE6
FE6
7
0
0
1
0
1
0
1
If POWER6 = 0 and RXE6 = 0, or if ASIS6 register is read
If the parity of transmit data does not match the parity bit on completion of reception
If POWER6 = 0 and RXE6 = 0, or if ASIS6 register is read
If the stop bit is not detected on completion of reception
If POWER6 = 0 and RXE6 = 0, or if ASIS6 register is read
If receive data is set to the RXB6 register and the next reception operation is completed before the
data is read.
6
0
CHAPTER 10 SERIAL INTERFACE UART6
Preliminary User’s Manual U19014EJ1V0UD
5
0
Status flag indicating framing error
Status flag indicating overrun error
Status flag indicating parity error
4
0
3
0
PE6
2
For details, see CHAPTER 24
FE6
1
OVE6
0
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