M30622ECTFP datasheet(131/184 Pages) MITSUBISHI

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131

Tentative Specifications REV.A

Mitsubishi microcomputers

M16C / 62T Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Specifications in this manual are tentative and subject to change.

Under

development

Clock asynchronous serial I/O (UART) mode

Table 1.19.7 lists the functions of the input/output pins during UART mode. This table shows the pin

_______ _______

functions when the separate CTS/RTS pins function is not selected. Note that for a period from when the

UARTi operation mode is selected to when transfer starts, the TxDi pin outputs a “H”. (If the N-channel

open-drain is selected, this pin is in floating state.)

Table 1.19.7. Input/output pin functions in UART mode

Pin name

Function

Method of selection

TxDi

(P63, P67, P70)

Serial data output

Serial data input

Programmable I/O port

Transfer clock input

Programmable I/O port

RxDi

(P62, P66, P71)

CLKi

(P61, P65, P72)

Internal/external clock select bit (bit 3 at address 03A016, 03A816, 037816) = “0”

Internal/external clock select bit (bit 3 at address 03A016, 03A816, 037816) = “1”

Port P61, P65 and P72 direction register (bits 1 and 5 at address 03EE16,

bit 2 at address 03EF16) = “0”

Port P62, P66 and P71 direction register (bits 2 and 6 at address 03EE16,

bit 1 at address 03EF16)= “0”

(Can be used as an input port when performing transmission only)

CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) =“0”

CTS/RTS function select bit (bit 2 at address 03A416, 03AC16, 037C16) = “0”

Port P60, P64 and P73 direction register (bits 0 and 4 at address 03EE16,

bit 3 at address 03EF16) = “0”

CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) = “0”

CTS/RTS function select bit (bit 2 at address 03A416, 03AC16, 037C16) = “1”

CTS/RTS disable bit (bit 4 at address 03A416, 03AC16, 037C16) = “1”

CTS input

RTS output

CTSi/RTSi

(P60, P64, P73)

(Note 1)

(Note 2)

________ _______

(when separate CTS/RTS pins function is not selected)

Note 1: In M30623(80-pin package), use the internal clock as transfer clock of UART2, because there is no

external pin of CLK2(P72).

Note 2: In M30623(80-pin package), UART2 does not have these functions, because there is no external pin

________

_______

of CTS2/RTS2(P73).

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