參數(shù)資料
型號: M37210M3-XXXFP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64
文件頁數(shù): 6/59頁
文件大小: 764K
代理商: M37210M3-XXXFP
MITSUBISHI MICROCOMPUTERS
M37210M3-XXXSP/FP, M37210M4-XXXSP, M37211M2-XXXSP
M37210E4-XXXSP/FP, M37210E4SP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
14
Fig. 9 Serial I/O timing (for LSB first)
The serial I/O counter is set to 7 when data is stored in the serial I/O
register. At each falling edge of the transfer clock, serial data is out-
put to SOUT. During the rising edge of this clock, data can be input
from SIN and the data in the serial I/O register will be shifted 1 bit.
Transfer direction can be selected by bit 5 of serial I/O mode register.
After the transfer clock has counted 8 times, the serial I/O register will
be empty and the transfer clock will remain at a high level. At this time
the interrupt request bit will be set.
External clock- If an external clock is used, the interrupt request will
be sent after the transfer clock has counted 8 times but transfer clock
will not stop.
Due to this reason, the external clock must be controlled from the
outside. The external clock should not exceed 1MHz at a duty cycle
of 50%. The timing diagram is shown in Figure 9. When using an ex-
ternal clock for transfer, the external clock must be held at “H” level
when the serial I/O counter is initialized. When switching between the
internal clock and external clock, the switching must not be per-
formed during transfer. Also, the serial I/O counter must be initialized
after switching.
Notes 1: On programming, note that the serial I/O counter is set by
writing to the serial I/O register with the bit managing in-
structions as SEB and CLB instructions.
2: When an external clock is used as the synchronizing clock,
write transmit data to the serial I/O register at “H” of the
transfer clock input level.
D0
D1
D2
D3
D4
D5
D6
D7
(Note 1)
Interrupt request bit set
Sync. clock
Transfer clock
Serial I/O register
write signal
Serial I/O output
SOUT
Serial I/O input
SIN
Notes 1 : If internal clock is selected, the Sout pin is at high impedance after transfer is completed.
2 : When an external clock is used as the synchronous clock, write the transmit data to the
serial I/O shift register at “H” of the transfer clock input level.
相關PDF資料
PDF描述
M37210E4-XXXSP 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP52
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M37210M3-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37210E4SP 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37210M3-XXXFP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PQFP64
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