Q67120-C1045 データシートの表示（PDF） - Infineon Technologies

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Q67120-C1045

8-Bit CMOS Microcontroller

Infineon Technologies 

C509-L

Table 1

Pin Definitions and Functions (cont’d)

Symbol

OWE

P6.0 - P6.7

*) I = Input

O = Output

Pin Number

45

46-50,

54-56

46

47

48

49

I/O*) Function

I

Oscillator Watchdog Enable

A high level on this pin enables the oscillator watchdog.

When left unconnected, this pin is pulled high by a weak

internal pullup resistor. The logic level at OWE should

not be changed during normal operation. When held at

low level the oscillator watchdog function is turned off.

During hardware power down the pullup resistor is

switched off.

I/O Port 6

is an 8-bit quasi-bidirectional I/O port with internal pullup

resistors. Port 6 pins that have 1's written to them are

pulled high by the internal pullup resistors, and in that

state can be used as inputs. As inputs, port 6 pins being

externally pulled low will source current (I IL, in the DC

characteristics) because of the internal pullup resistors.

Port 6 can also be switched into a bidirectional mode, in

which CMOS levels are provided. In this bidirectional

mode, each port 6 pin can be programmed individually

as input or output.

Port 6 also contains the external A/D converter control

pin, the receive and transmission lines for the serial port

1, and the write-FLASH control signal. The output latch

corresponding to a secondary function must be

programmed to a one (1) for that function to operate.

The secondary functions are assigned to the pins of

port 6 as follows :

P6.0 ADST External A/D converter start pin

P6.1 R×D1 Receiver data input of serial interface 1

P6.2 T×D1 Transmitter data output of serial

interface 1

P6.3 WRF The WRF (write Flash) signal is active

when the programming mode is

selected. In this mode WRF becomes

active when executing external data

memory write (MOVX) instructions.

Semiconductor Group

9

09.96

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