TMP86CS64AFG datasheet(67/202 Pages) TOSHIBA

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Page 57

TMP86CS64AFG

5.2 Port P1 (P17 to P10)

Port P1 is an 8-bit input/output port, which can be configured individually as an input or an output under software

control. Input/output mode is specified by the corresponding bit in the port P1 input/output control register (P1CR).

During reset, the P1CR is initialized to “0”, which configures port P1 as an input mode. The P1 output latches are

also initialized to “0”.

It is also used as INT0, INT1, INT2/TC1, TC2, DVO and PPG. When used as secondary function pin, the input pins

(INT0, INT1, INT2, TC1,TC2) should be set to the input mode and the output pins (DVO, PPG) should be set to the

output mode beforehand the output latch should be set to “1”.

Note 1: i = 7 to 0

Note 2: STOP: bit 7 in SYSCR1, OUTEN: bit 4 in SYSCR1

Figure 5-3 Port P1

Note: When used as an input mode, read-modify-write instructions such as bit manipulate instructions cannot be used. Read-

modify-write instruction writes the all data of 8-bit after read and modified. Because a bit setting input mode reads data of

terminal, the output latch is changed by these instructions.

P1DR

(0001H)

543

P17

P16

P15

TC2

P14

PPG

P13

DVO

P12

INT2

TC1

P11

INT1

P10

INT0

(Initial value: 0000 0000)

P1CR

(0009H)

543

P1CR7

P1CR6

P1CR5

P1CR4

P1CR3

P1CR2

P1CR1

P1CR0

(Initial value: 0000 0000)

P1CR

I/O control for port P1

(specified for each bit)

0: Input mode

1: Output mode

R/W

Output latch

STOP

OUTEN

Data input

Data output

P1CRi

P1i

Control output

Control input

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