M30622 Mitsubishi, M30622 Datasheet - Page 112

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Serial I/O
Serial I/O
UART0 to 2
Table 1.19.1. Comparison of functions of UART0 through UART2
Note 1: Only when clock synchronous serial I/O mode.
Note 2: Only when clock synchronous serial I/O mode and 8-bit UART mode.
Note 3: Only when UART mode.
Note 4: Using for SIM interface.
Note 5: In M30623(80-pin package), do not use this function, because CLK
Note 6: Connect via pull-up resistor to V
Note 7: Generally, it use in case of IE bus-emulation.
Serial I/O is configured as five channels: UART0, UART1, UART2, S I/O3 and S I/O4.
UART0, UART1 and UART2 each have an exclusive timer to generate a transfer clock, so they operate
independently of each other.
Figure 1.19.1 shows the block diagram of UART0, UART1 and UART2. Figures 1.19.2 and 1.19.3 show
the block diagram of the transmit/receive unit.
UARTi (i = 0 to 2) has two operation modes: a clock synchronous serial I/O mode and a clock asynchronous
serial I/O mode (UART mode). The contents of the serial I/O mode select bits (bits 0 to 2 at addresses
03A0
UART. Although a few functions are different, UART0, UART1 and UART2 have almost the same functions.
UART0 through UART2 are almost equal in their functions with minor exceptions. UART2, in particular, is
compliant with the SIM interface with some extra settings added in clock-asynchronous serial I/O mode
(Note). It also has the bus collision detection function that generates an interrupt request if the TxD pin and
the RxD pin are different in level.
In M30623(80-pin package), UART2 has the clock-asynchronous serial I/O mode and IIC mode.
Table 1.19.1 shows the comparison of functions of UART0 through UART2, and Figures 1.19.4 to 1.19.8
show the registers related to UARTi.
Note: SIM : Subscriber Identity Module
CLK polarity selection
LSB first / MSB first selection
Continuous receive mode selection
Transfer clock output from multiple
pins selection
Separate CTS/RTS pins
Serial data logic switch
Sleep mode selection
TxD, RxD I/O polarity switch
TxD, RxD port output format
Parity error signal output
Bus collision detection
16
Tentative Specifications REV.A
, 03A8
S
pecifications in this manual are tentative and subject to change.
Function
16
and 0378
16
) determine whether UARTi is used as a clock synchronous serial I/O or as a
Possible (Note 3)
Possible (Note 1)
Possible (Note 1)
Possible (Note 1)
Impossible
Possible
Impossible
Impossible
CMOS output
Impossible
Impossible
CC
outside.
UART0
112
Possible (Note 1)
Possible (Note 1)
Possible
Impossible
Impossible
Possible
Impossible
CMOS output
Impossible
Impossible
Possible (Note 1)
UART1
(Note 1)
(Note 3)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
2
and CTS
Possible (Note 1)
(100pin-package)
M30622
2
/RTS
Mitsubishi microcomputers
Impossible
N-channel open-drain
output
Possible
Possible
Possible
Impossible
Possible
Impossible
Possible
Possible
2
UART2
have no external pin.
M16C / 62T Group
Impossible (Note 5)
(80pin-package)
M30623
(Note 4)
(Note 4)
(Note 2)
(Note 1)
(Note 6)
(Note 7)