TMP89FS60 datasheet(120/410 Pages) TOSHIBA

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Page 106

8. I/O Ports

8.3 I/O Port Registers

TMP89FS60

RA005

8.3.4

Port P4 (P47 to P40)

Port P4 is an 8-bit input/output port that can be set to input or output for each bit individually, and it is also

used as the analog input and the key-on wakeup input.

Port P4 contains a programmable pull-up resistor on the VDD side. This pull-up resistor can be used when

the port is used in the input mode.

Figure 8-6 Port P4

Table 8-10 Port P4

P47P46

P45P44

P43

P42

P41P40

Secondary

function

AIN7

KWI7

AIN6

KWI6

AIN5

KWI5

AIN4

KWI4

AIN3

KWI3

AIN2

KWI2

AIN1

KWI1

AIN0

KWI0

Output latch

(for each bit)

P4DR write

P4i

RIN3

Note1 : R = 100

Ω (typ.)

Note2 : RIN3 = 50k

Ω (typ.)

Note3 : i = 0 to 7

KWIi

Key-on

wakeup

Peripheral

functions

P4PRD read

AINi enable signal

KWIi enable signal

ADCCR1<AINEN>

Function control

(for each bit)

Input/output control

(for each bit)

P4FC write

P4CR write

Programmable

pull-up resistor

VDD

Pull-up control

(for each bit)

P4PU write

Reset signal

AINi

SYSCR1<STOP>

SYSCR1<OUTEN>

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