M16CSLASH62 datasheet(140/615 Pages) RENESAS

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Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Clock synchronous serial I/O mode

1-121

Table 1.16.4 lists the functions of the input/output pins during clock synchronous serial I/O mode. This

table shows the pin functions when the transfer clock output from multiple 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 an “H”. (If the N-channel open-drain is selected, this pin is in floating state.)

Table 1.16.4. Input/output pin functions in clock synchronous serial I/O mode

Pin name

Function

Method of selection

TxDi

(P63, P67, P70)

Serial data output

Serial data input

Transfer clock output

Transfer clock input

Programmable I/O port

(Outputs dummy data when performing reception only)

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)

(when transfer clock output from multiple pins is not selected)

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