M30621ECGP MITSUBISHI [Mitsubishi Electric Semiconductor], M30621ECGP Datasheet - Page 90

• Manufacturer Part Number: M30621ECGP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Serial I/O
90
Figure 1.14.4. Serial I/O-related registers (1)
(b15)
b7
UARTi transmit buffer register
UARTi receive buffer register
UARTi bit rate generator
b7
(b15)
b7
(b8)
(b8)
b0
b0
b0
b7
b7
Note 1: Bits 15 through 12 are set to “0” when the serial I/O mode select bit (bits 2 to 0 at addresses 03A0
Note 2: Arbitration lost detecting flag is allocated to U2RB and noting but “0” may be written. Nothing is
03A8
(Bit 15 is set to “0” when bits 14 to 12 all are set to “0”.) Bits 14 and 13 are also set to “0” when the
lower byte of the UARTi receive buffer register (addresses 03A6
assigned in bit 11 of U0RB and U1RB. These bits can neither be set or reset. When read, the value
of this bit is “0”.
symbol
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turn out to be indeterminate.
Transmit data
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turn out to be “0”.
SUM
Assuming that set value = n, BRGi divides the count source by
n + 1
OER
FER
PER
ABT
Bit
b0
b0
16
and 0378
Parity error flag (Note 1)
Arbitration lost detecting
flag (Note 2)
Overrun error flag (Note 1)
Framing error flag (Note 1)
Error sum flag (Note 1)
Symbol
Symbol
U0TB
U1TB
U2TB
U0BRG
U1BRG
U2BRG
Symbol
16
U0RB
U1RB
U2RB
) are set to “000
Bit name
03AB
03A3
037B
03AF
03A7
Function
037F
Address
Address
Address
03A1
03A9
0379
16
16
16
16
16
16
, 03A2
, 03AA
, 037A
2
, 03A6
, 03AE
, 037E
” or the receive enable bit is set to “0”.
16
16
16
0 : Not detected
1 : Detected
0 : No overrun error
1 : Overrun error found
Invalid
Invalid
Invalid
Receive data
(During clock synchronous
16
16
16
16
16
16
Function
serial I/O mode)
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Function
Indeterminate
Indeterminate
Indeterminate
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
When reset
When reset
When reset
M16C / 62 Group (80-pin)
16
, 03AE
0 : No framing error
1 : Framing error found
0 : No parity error
1 : Parity error found
Invalid
0 : No overrun error
1 : Overrun error found
0 : No error
1 : Error found
Receive data
(During UART mode)
Values that can be set
16
and 037E
Function
Mitsubishi microcomputers
00
16
to FF
16
) is read out.
16
R
R
R
W
W
16
W
,