參數(shù)資料
型號: M38B79MFH-A154FP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機
文件頁數(shù): 34/109頁
文件大?。?/td> 1559K
代理商: M38B79MFH-A154FP
38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
34
When the internal synchronous clock is selected, in the 8-bit serial
I/O mode and the automatic transfer serial I/O mode (S
BUSY1
out-
put function outputs in 1-byte units), the S
BUSY1
output goes to
L
and the S
BUSY1
output goes to
H
before 0.5 cycle (transfer clock)
of the timing at which the transfer clock from the S
CLK1
output
goes to
L
at a start of transmit/receive operation.
In the automatic transfer serial I/O mode (the S
BUSY1
output func-
tion outputs all transfer data), the S
BUSY1
output goes to
L
and
the S
BUSY1
output goes to
H
when the first transmit data is writ-
ten into the serial I/O1 register (address 001B
16
).
When the external synchronous clock is selected, the S
BUSY1
out-
put goes to
L
and the S
BUSY1
output goes to
H
when transmit
data is written into the serial I/O1 register to start a transmit opera-
tion, regardless of the serial I/O transfer mode.
At termination of transmit/receive operation, the S
BUSY1
output re-
turns to
H
and the S
BUSY1
output returns to
L
, the initial status,
when the serial transfer status flag is set to
0
, regardless of
whether the internal or external synchronous clock is selected.
Furthermore, in the automatic transfer serial I/O mode (S
BUSY1
output function outputs in 1-byte units), the S
BUSY1
output goes to
H
and the S
BUSY1
output goes to
L
each time 1-byte of receive
data is written into the automatic transfer RAM.
Fig. 29 S
BUSY1
output operation
(internal synchronous clock, 8-bit serial I/O)
Fig. 30 S
BUSY1
output operation
(external synchronous clock, 8-bit serial I/O)
Fig. 31 S
BUSY1
output operation in automatic transfer serial I/O mode
(internal synchronous clock, S
BUSY1
output function outputs each 1-byte)
S
BUSY1
S
CLK1
S
OUT1
Serial transfer
status flag
Serial transfer
status flag
S
BUSY1
S
CLK1
Write to Serial
I/O1 register
S
CLK1
S
BUSY1
S
OUT1
Automatic transfer
interval
Serial transfer
status flag
Automatic transfer RAM
Serial I/O1 register
Serial I/O1 register
Automatic transfer RAM
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