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參數(shù)資料
| 型號(hào)： | M3720-3 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 1 KEY 1 SOUND |
| 中文描述： | 1鍵1聲 |
| 文件頁(yè)數(shù)： | 26/121頁(yè) |
| 文件大?。?/td> | 1907K |
| 代理商： | M3720-3 |
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MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
26
Fig. 19. Serial I/O Timing (for LSB first)
____
Internal clock : The
S
RDY
signal goes to HIGH during the write cycle
by writing data into the serial I/O register (address 00DD
16
). After the
write cycle, the
S
RDY
signal goes to “L” (receive enable state). The
S
RDY
signal goes to “H” at the next falling edge of the transfer clock
for the serial I/O register.
The serial I/O counter is set to “7” during write cycle into the serial I/
O register (address 00DD
16
), and transfer clock goes HIGH forcibly.
At each falling edge of the transfer clock after the write cycle, serial
data is output from the S
OUT
pin. Transfer direction can be selected
by bit 5 of the serial I/O mode register. At each rising edge of the
transfer clock, data is input from the S
IN
pin and data in the serial I/O
register is shifted 1 bit.
After the transfer clock has counted 8 times, the serial I/O counter
becomes “0” and the transfer clock stops at HIGH. At this time the
interrupt request bit is set to “1.”
External clock : When an external clock is selected as the clock source,
the interrupt request is set to “1” after the transfer clock has counted
8 counts. However, transfer operation does not stop, so the clock
should be controlled externally. Use the external clock of 1 MHz or
less with a duty cycle of 50%.
The serial I/O timing is shown in Figure 19. When using an external
clock for transfer, the external clock must be held at “H” for initializing
the serial I/O counter. When switching between an internal clock and
an external clock, do not switch during transfer. Also, be sure to ini-
tialize the serial I/O counter 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 such as SEB and CLB.
2:
When an external clock is used as the synchronous clock,
write transmit data to the serial I/O register when the trans-
fer clock input level is HIGH.
Synchronous clock
Transfer clock
Serial I/O register
write signal
Serial I/O output
S
OUT
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
(See note)
Serial I/O input
S
IN
Note :
When an internal clock is selected, the S
OUT
pin is at high-impedance after transfer is completed.
Interrupt request bit is set to “1”
Receive
signal
enable
S
RDY
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M3720-4 | 1 KEY 1 SOUND |
| M3720-5 | 26604060VOID34 |
| M3720-6 | 1 KEY 1 SOUND |
| M3720-7 | 1 KEY 1 SOUND |
| M3720-8 | 1 KEY 1 SOUND |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M3720-4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND |
| M3720-5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND |
| M3720-6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND |
| M3720-7 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND |
| M37207EFFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER and ON-SCREEN DISPLAY CONTROLLER |
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