參數(shù)資料
型號(hào): M34502M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PDSO24
封裝: 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24
文件頁數(shù): 31/96頁
文件大?。?/td> 958K
代理商: M34502M4-XXXFP
37
Ver 1.4
MITSUBISHI MICROCOMPUTERS
7640 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
1.18 SERIAL I/O
The Serial I/O has the following main features:
Synchronous transmission or reception
Handshaking via SRDY output signal
8-bit character length
Interrupt after transmission or reception
Internal Clock
(When serial I/O synchronous clock select bit is “1”,
internal clock source divided by 2, 4, 8, 16, 32, 64,
128, 256 can be selected). If bit 1 of SIO Control Reg
ister 2 is “0”, internal clock source =
.; if bit 1 of SIO
Control Register 2 is “1”, internal clock source =
SCSGCLK.)
External Clock
(When SIO synchronous clock select bit is “1”, an
external clock input from the SCLK pin is selected).
An SPI compatible mode in which the TxD and RxD
pins function as MOSI and MISO pins, respectively.
Four (SPI compatible) clock phase and polarity options.
A block diagram of the clock synchronous SIO is shown
in Figure 1.36.
Fig. 1.36. Clock Synchronous SIO Block Diagram
1/2
1/4
1/8
1/16
1/32
1/64
1/128
1/256
Φ
1
SCSel
Data Bus
Synchronous
Circuit
SRDY
P80 Latch
P81 Latch
SCLK
P83 Latch
STXD
SIO
Counter
SIO Interrupt Request
SIO
Shift
Re
gister
SRXD
0
1
PSel
0
1
RD
YSel
External
Clock
0
SCSGCLK
1
0
1
CLKSEL
SRDY
SPI Slave
Divider
SPI
SCSel
CPol
CPha
01
SPI
Slave
SPI
Slave
Selected
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