參數(shù)資料
型號(hào): M37920FGCGP
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
中文描述: 單片微機(jī)16位的CMOS(16位單片機(jī))
文件頁數(shù): 64/158頁
文件大?。?/td> 1261K
代理商: M37920FGCGP
M37920FCCGP, M37920FCCHP
M37920FGCGP, M37920FGCHP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
MITSUBISHI MICROCOMPUTERS
64
Fig. 60 Transmit timing example when 8-bit asynchronous communication with parity and 1 stop bit selected
Fig. 61 Transmit timing example when 9-bit asynchronous communication with no parity and 2 stop bits selected
ASYNCHRONOUS
SERIAL COMMUNICATION
Asynchronous serial communication can be performed using 7-, 8-, or
9-bit length data. The operation is the same for all data lengths. The
following is the description for 8-bit asynchronous communication.
With 8-bit asynchronous communication, bit 0 of UARTi transmit/re-
ceive mode register is
1
, bit 1 is
0
, and bit 2 is
1
.
Bit 3 is used to select an internal clock or an external clock. If bit 3 is
0
, an internal clock is selected and if bit 3 is
1
, then external clock
is selected. If an internal clock is selected, bit 0 (CS
0
) and bit 1 (CS
1
)
of UARTi transmit/receive control register 0 are used to select the
clock source. When an internal clock is selected for asynchronous
serial communication, the CLKi pin can be used as a normal I/O pin.
The selected internal or external clock is divided by (n + 1), then by
16, and is passed through a control circuit to create the UART trans-
mission clock or UART receive clock.
Therefore, the transmission speed can be changed by changing the
contents (n) of the bit rate generator. If the selected clock is an inter-
nal clock Pfi or an external clock f
EXT
,
Bit Rate = (fi or f
EXT
) / {(n + 1)
×
16}
Bit 4 is the stop bit length select bit to select 1 stop bit or 2 stop bits.
Bit 5 is a select bit of odd parity or even parity.
In the odd parity mode, the parity bit is adjusted so that the sum of 1s
in the data and parity bit is always odd.
In the even parity mode, the parity bit is adjusted so that the sum of
the 1s in the data and parity bit is always even.
Bit 6 is the parity bit select bit which indicates whether to add parity
bit or not.
Bits 4 to 6 must be set or reset according to the data format used in
the communicating devices.
Bit 7 is the sleep select bit. The sleep mode is described later.
The function and select method of the CTS/RTS pin are the same as
those of the clock synchronous serial communication mode.
(1/f
i
or 1/f
EXT
)
×
(n
+
1)
×
16
Written in transmit buffer register
Transmission clock
TE
i
TI
i
CTS
i
T
ENDi
T
X
D
i
T
X
EPTY
i
D
0
D
1
ST
Start bit
Parity bit Stop bit
D
2
D
3
D
4
D
5
D
6
D
7
P
SP ST D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
P
SP
ST D
0
D
1
Transmit register
Transmit
buffer register
Stopped because TE
i
=
0
(1/f
i
or 1/f
EXT
)
×
(n
+
1)
×
16
Written in transmit buffer register
Transmission clock
TE
i
TI
i
T
ENDi
T
X
D
i
T
X
EPTY
i
D
0
D
1
ST
D
2
D
3
D
4
D
5
D
6
D
7
D
8
SP
SP
ST D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
SP SP
ST D
0
D
2
D
1
Transmit register
Transmit
buffer register
Stopped because TE
i
=
0
Start bit
Stop bit
Stop bit
相關(guān)PDF資料
PDF描述
M37920FCCGP Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M37920FCCHP Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M37920FGCHP Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M3802 Single Chip 8 Bits Microcomputer(8位單片機(jī))
M3820 Single Chip 8 Bits Microcomputer(8位單片機(jī))
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