TMP86CM29BUG datasheet(70/196 Pages) TOSHIBA

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Page 56

5. I/O Ports

5.5 Port P6 (P67 to P60)

TMP86CM29BUG

5.5 Port P6 (P67 to P60)

Port P6 is an 8-bit input/output port which can be configured as an input or an output in one-bit unit. Port P6 is also

used as an analog input, Key on Wake up input, timer/counter input and external interrupt input. Input/output modes

is specified by the P6 control register (P6CR), the P6 output latch (P6DR), and ADCCR1<AINDS>. During reset,

P6CR and P6DR are initialized to “0” and ADCCR1<AINDS> is set to “1”. At the same time, the input data of pins

P67 to P60 are fixed to “0”. To use port P6 as an input port, external interrupt input, timer/counter input or key on

wake up input, set data of P6DR to “1” and P6CR to “0”. To use it as an output port, set data of P6CR to “1”. To use

it as an analog input, set data of P6DR to “0” and P6CR to “0”, and start the AD. It is the penetration electric current

measures by the analog voltage.

Pins not used for analog input can be used as I/O ports. During AD conversion, output instructions should not be

executed to keep a precision. In addition, a variable signal should not be input to a port adjacent to the analog input

during AD conversion.

When the AD converter is in use (P6DR=0), bits mentioned above are read as “0” by executing input instructions.

Figure 5-6 Port P6

Data input (P6DR)

Data output (P6DR)

Key on wake up

Analog input

STOPj

STOP

Control input

AINDS

SAIN

P6CRi

P6CRi input

P6i

Note 1: i = 7 to 0, j = 7 to 4

Note 2: STOP is bit 7 in SYSCR1

Note 3: SAIN is bit 0 to 3 in ADCCRA

Note 4: STOPj is bit 4 to 7 in STOPCR.

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