参数资料
型号: M30201F4T-FP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP56
封装: PLASTIC, QFP-56
文件页数: 139/158页
文件大小: 1633K
代理商: M30201F4T-FP
81
Under
development
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Serial I/O
Figure 1.74. UART0 transmit/receive mode register in clock synchronous serial I/O mode
Clock synchronous serial I/O mode
Symbol
Address
When reset
U0MR
03A016
0016
CKDIR
UART0 transmit/receive mode registers
Internal/external clock
select bit
STPS
PRY
PRYE
SLEP
0 : Internal clock
1 : External clock
Bit name
Function
Bit symbol
W
R
b7
b6 b5
b4
b3
b2
b1 b0
0 (Must always be “0” in clock synchronous serial I/O mode)
01
0
SMD0
SMD1
SMD2
Serial I/O mode select bit
0 0 1 : Clock synchronous serial
I/O mode
b2 b1 b0
0
Invalid in clock synchronous serial I/O mode
Table 1.27 lists the functions of the input/output pins during clock synchronous serial I/O mode. Note that
for a period from when the UART0 operation mode is selected to when transfer starts, the TxD0 pin
outputs a “H”. (If the N-channel open-drain is selected, this pin is in floating state.)
Table 1.27. Input/output pin functions in clock synchronous serial I/O mode
Pin name
Function
Method of selection
TxD0
(P50)
Serial data output
Serial data input
Transfer clock output
Transfer clock input
Port P50 direction register (bit 0 at address 03EB16)= “1”
(Outputs dummy data when performing reception only)
RxD0
(P51)
CLK0
(P52)
Internal/external clock select bit (bit 3 at address 03A016) = “0”
Internal/external clock select bit (bit 3 at address 03A016) = “1”
Port P52 direction register (bit 2 at address 03EB16) = “0”
Port P51 direction register (bit 1 at address 03EB16)= “0”
(Can be used as an input port when performing transmission only)
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