M30622 Mitsubishi, M30622 Datasheet - Page 135

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Clock asynchronous serial I/O (UART) mode
Table 1.19.8. Specifications of clock-asynchronous serial I/O mode (compliant with the SIM interface)
Note 1: ‘n’ denotes the value 00
Note 2: f
Note 3: If an overrun error occurs, the UART2 receive buffer will have the next data written in. Note also that the UARTi
(3) Clock-asynchronous serial I/O mode (compliant with the SIM interface)
Transfer data format
Transfer clock
Transmission / reception control
Other settings
Transmission start condition • To start transmission, the following requirements must be met:
Reception start condition
Interrupt request
generation timing
Error detection
The SIM interface is used for connecting the microcomputer with a memory card or the like; adding some
extra settings in UART2 clock-asynchronous serial I/O mode allows the user to effect this function. Table
1.19.8 shows the specifications of clock-asynchronous serial I/O mode (compliant with the SIM interface).
Tentative Specifications REV.A
UART2, because there is no external pin of CLK
receive interrupt request bit is not set to “1”.
EXT
S
Item
pecifications in this manual are tentative and subject to change.
is input from the CLK
• Transfer data 8-bit UART mode (bit 2 through bit 0 of address 0378
• One stop bit (bit 4 of address 0378
• With the direct format chosen
• With the inverse format chosen
• With the internal clock chosen (bit 3 of address 0378
• With an external clock chosen (bit 3 of address 0378
• Disable the CTS and RTS function (bit 4 of address 037C
• The sleep mode select function is not available for UART2
• Set transmission interrupt factor to “transmission completed” (bit 4 of address 037D
• To start reception, the following requirements must be met:
• When transmitting
• When receiving
• Overrun error (see the specifications of clock-asynchronous serial I/O) (Note 3)
• Framing error (see the specifications of clock-asynchronous serial I/O)
• Parity error (see the specifications of clock-asynchronous serial I/O)
• The error sum flag (see the specifications of clock-asynchronous serial I/O)
16
Set parity to “even” (bit 5 and bit 6 of address 0378
Set data logic to “direct” (bit 6 of address 037D
Set transfer format to LSB (bit 7 of address 037C
Set parity to “odd” (bit 5 and bit 6 of address 0378
Set data logic to “inverse” (bit 6 of address 037D
Set transfer format to MSB (bit 7 of address 037C
2
- Transmit enable bit (bit 0 of address 037D
- Transmit buffer empty flag (bit 1 of address 037D
- Reception enable bit (bit 2 of address 037D
- Detection of a start bit
When data transmission from the UART2 transfer register is completed
(bit 4 of address 037D
When data transfer from the UART2 receive register to the UART2 receive
buffer register is completed
- On the reception side, an “L” level is output from the T
- On the transmission side, a parity error is detected by the level of input to
to FF
signal output function (bit 7 of address 037D
the R
pin. In M30623(80-pin package), do not select the external clock as transfer clock of
16
X
D
that is set to the UARTi bit rate generator.
2
_______
pin when a transmission interrupt occurs
135
_______
2
.
16
= “1”)
Specification
16
= “0”)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
16
16
= “1”) when a parity error is detected
= “0”) : fi / 16 (n + 1) (Note 1) : fi=f
= “1”) : f
16
16
16
16
) = “1”
16
X
) = “1”
16
16
= “0” and “1” respectively)
D
= “0”).
16
= “1” and “1” respectively)
EXT
2
= “1”)
= “0”).
16
pin by use of the parity error
= “1”)
Mitsubishi microcomputers
/ 16 (n+1) (Note 1) (Note 2)
) = “0”
M16C / 62T Group
16
= “1”)
16
= “101
16
1
, f
= “1”)
8
2
, f
”)
32