M30622M4 MITSUBISHI [Mitsubishi Electric Semiconductor], M30622M4 Datasheet - Page 121

• Manufacturer Part Number: M30622M4
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Clock synchronous serial I/O mode
Table 1.19.2. Specifications of clock synchronous serial I/O mode (1)
Note 1: “n” denotes the value 00
Note 2: If an overrun error occurs, the UARTi receive buffer will have the next data written in. Note also that
(1) Clock synchronous serial I/O mode
Interrupt request
generation timing
Transfer data format
Transfer clock
Transmission/reception control
Transmission start condition • To start transmission, the following requirements must be met:
Reception start condition
Error detection
The clock synchronous serial I/O mode uses a transfer clock to transmit and receive data. Tables 1.19.2
and 1.19.3 list the specifications of the clock synchronous serial I/O mode. Figure 1.19.9 shows the
UARTi transmit/receive mode register.
the UARTi receive interrupt request bit is not set to “1”.
Item
• Transfer data length: 8 bits
• When internal clock is selected (bit 3 at addresses 03A0
• When external clock is selected (bit 3 at addresses 03A0
•
_
_
_
• Furthermore, if external clock is selected, the following requirements must also be met:
_
_
• To start reception, the following requirements must be met:
_
_
_
• Furthermore, if external clock is selected, the following requirements must
_
_
• When transmitting
_
_
• When receiving
_
• Overrun error (Note 2)
= “0”) : fi/ 2(n+1) (Note 1)
= “1”) : Input from CLKi pin
CLKi input level = “H”
CLKi input level = “L”
also be met:
CLKi input level = “H”
CLKi input level = “L”
address 037D
transfer buffer register to UARTi transmit register is completed
address 037D
UARTi transfer register is completed
UARTi receive buffer register is completed
This error occurs when the next data is ready before contents of UARTi
receive buffer register are read out
_______
CTS
Transmit enable bit (bit 0 at addresses 03A5
Transmit buffer empty flag (bit 1 at addresses 03A5
When CTS function selected, CTS input level = “L”
CLKi polarity select bit (bit 6 at addresses 03A4
CLKi polarity select bit (bit 6 at addresses 03A4
Receive enable bit (bit 2 at addresses 03A5
Transmit enable bit (bit 0 at addresses 03A5
Transmit buffer empty flag (bit 1 at addresses 03A5
CLKi polarity select bit (bit 6 at addresses 03A4
CLKi polarity select bit (bit 6 at addresses 03A4
Transmit interrupt cause select bit (bits 0, 1 at address 03B0
Transmit interrupt cause select bit (bits 0, 1 at address 03B0
Interrupts requested when data transfer from UARTi receive register to
16
to FF
function/
_______
16
that is set to the UART bit rate generator.
_______
RTS
16
16
) = “0”: Interrupts requested when data transfer from UARTi
) = “1”: Interrupts requested when data transmission from
function/
CTS
_______
fi = f
_______
,
1
_______
RTS
, f
Specification
8
, f
function chosen to be invalid
32
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
16
16
, 03AD
, 03AD
, 03AD
16
16
16
16
, 03AC
, 03AC
, 03AC
, 03AC
16
16
, 03AD
, 03AD
16
16
16
, 037D
, 037D
, 037D
16
16
16
16
16
16
Mitsubishi microcomputers
, 03A8
, 03A8
M16C / 62 Group
16
16
, 037C
, 037C
, 037C
, 037C
, 037D
, 037D
16
16
16
16
16
, bit 4 at
, bit 4 at
) = “1”
) = “1”
) = “1”
16
16
16
16
16
16
, 0378
, 0378
16
16
) = “0”:
) = “1”:
) = “0”:
) = “1”:
) = “0”
) = “0”
16
16
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