參數(shù)資料
型號: M37905M8C-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64
文件頁數(shù): 61/102頁
文件大?。?/td> 881K
代理商: M37905M8C-XXXFP
61
M37905M4C-XXXFP, M37905M4C-XXXSP
M37905M6C-XXXFP, M37905M6C-XXXSP
M37905M8C-XXXFP, M37905M8C-XXXSP
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
16-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Selection of transfer format
In clock synchronous serial communication, transfer format can be
selected by bit 7 of the transmit/receive control register 0. When bit 7
is “0”, transfer format is LSB first. When bit 7 is “1”, transfer format is
MSB first.
This function is realized by changing connection relation between
the transmit buffer register and the receive buffer register when writ-
ing transmit data to the transmit buffer register or reading receive
data from the receive buffer register. Accordingly, the transmitter’s
operation is the same in both transfer formats.
Figure 68 shows the connection relation.
Fig. 68 Connection relation between transmit buffer register, receive buffer register, and data bus
Bit 7 in transmit/receive
control register 0
Write to transmit
buffer register
Read from receive
buffer register
0
(LSB first)
1
(MSB first)
Transmit buffer
register
DB7
Data bus
D7
D6
D5
D4
D3
D2
D1
D0
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Transmit buffer
register
DB7
Data bus
D7
D6
D5
D4
D3
D2
D1
D0
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Receive buffer
register
DB7
Data bus
D7
D6
D5
D4
D3
D2
D1
D0
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Receive buffer
register
DB7
Data bus
D7
D6
D5
D4
D3
D2
D1
D0
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Precautions for clock synchronous serial
communication
In the clock synchronous serial communication, the separate func-
tion for CTSi/RTSi cannot be selected. Furthermore, when an inter-
nal clock is selected, RTS output is undefined. Therefore, do not use
the RTS function.
Before transmit operation is performed, be sure to clear bits 2, 3 and
5 of the serial I/O pin control register (address AC16) to “00”.
相關(guān)PDF資料
PDF描述
M37905M8C-XXXSP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PDIP64
M37905M4C-XXXSP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PDIP64
M37905M4C-XXXFP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP64
M37905M8C-XXXFP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP64
M37905M6C-XXXSP 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PDIP64
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