M30240ECFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30240ECFP Datasheet - Page 92

• Manufacturer Part Number: M30240ECFP
• Description: M30240 Group Specification
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Specifications in this manual are tentative and subject to change
UART0 through UART2
Table 1.25:
Figure 1.82: UARTi transmit/receive mode register in clock synchronous serial I/O mode
Select function
Item
Specifications of clock synchronous serial I/O mode (2)
UARTi transmit/receive mode registers
UART2 transmit/receive mode register
0
b7
0
• CLK polarity selection
Whether transmit data is output/input at the rising edge or falling edge of the transfer clock can be
selected
• LSB first/MSB first selection
• Continuous receive mode selection
Reception is enabled simultaneously by a read from the receive buffer register
• Transfer clock output from multiple pins selection (UART1)
UART1 transfer clock can be chosen by software to be output from one of the two pins set
• Switching serial data logic (UART2)
Whether to reverse data in writing to the transmission buffer register or reading the reception buffer
register can be selected.
• Switching serial data logic (UART2)
This function is reversing TxD port output and RxD port input. All I/O data level is reversed.
b7
Whether transmission/reception begins with bit 0 or bit 7 can be selected
b6
b6
b5
b5
b4
b4
b3
b3
b2
0
b2
0
b1
0 1
b1
0 1
b0
b0
Note: Usually set to “0”.
Bit symbol
Bit symbol
CKDIR
CKDIR
IOPOL
SMD0
SMD1
SMD2
STPS
PRYE
SMD0
SMD1
SMD2
PRYE
SLEP
STPS
PRY
PRY
UiMR(i=0,1)
Symbol
Symbol
U2MR
Serial I/O mode select bit
Serial I/O mode select bit
Internal/external clock
select bit
Invalid in clock synchronous serial I/O mode
0 (Must always be “0” in clock synchronous serial I/O mode)
Internal/external clock
select bit
Invalid in clock synchronous serial I/O mode
TxD, RxD I/O polarity
reverse bit (Note)
1-92
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
03A0
Bit name
Bit name
Address
Address
0378
16
Specification
, 03A8
16
16
When reset
When reset
b2 b1 b0
0 0 1 : Clock synchronous serial
b2 b1 b0
0 0 1 : Clock synchronous serial
0 : Internal clock
1 : External clock
0 : Internal clock
1 : External clock
0 : No reverse
1 : Reverse
00
00
16
16
I/O mode
I/O mode
Function
Function
Mitsubishi microcomputers
M30240 Group
R
R
W
W