M306V0ME-107FP MITSUBISHI [Mitsubishi Electric Semiconductor], M306V0ME-107FP Datasheet - Page 131

• Manufacturer Part Number: M306V0ME-107FP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

MITSUBISHI MICROCOMPUTERS
M306V0ME-XXXFP
M306V0EEFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Bit 1 of the special UART2 mode register (0377
) is used as the arbitration lost detecting flag control bit.
16
Arbitration means the act of detecting the nonconformity between transmission data and SDA terminal
data at the timing of the SCL rising edge. This detection flag is located at bit 3 of the UART2 reception
buffer register (037F
), and “1” is set in this flag when nonconformity is detected. Use the arbitration lost
16
detecting flag control bit to choose which way to use to update the flag, bit by bit or byte by byte. Setting
this bit to “1” sets the flag for each byte. When detecting nonconformity, the arbitration lost detecting flag
is set to “1” at the falling edge of the ninth clock. To update the flag, be sure to determinate the flag and set
“0” to it until the next 1-byte transfer starts after the detection of first-byte acknowledge.
Bit 3 of the UART2 special mode register is used as SCL L sync output enable bit. Setting this bit to “1”
resets the data register of port (P7
when using SCL1, P7
when using SCL2, P7
when using both SCL1
1
2
1
and SCL2) to “0” in synchronization with the SCL terminal’s level going to “L.”
Rev. 1.0
131