Q67120-C0581 查看數據表（PDF） - Infineon Technologies

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Q67120-C0581

8-Bit CMOS Single-Chip Microcontroller

Infineon Technologies 

SAB 80C515A/83C515A-5

Pin Definitions and Functions

Symbol Pin

Pin

Input (I) Function

P-LCC-68 P-MQFP-80 Output (O)

P4.0-P4.7 1-3, 5-9 72-74,

I/O

76-80

Port 4

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

pull-up resistors. Port 4 pins that have 1’s writ-

ten to them are pulled high by the internal pull-

up resistors, and in that state can be used as

inputs. As inputs, port 4 pins being externally

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

characteristics) because of the internal pull-up

resistors.

P4 also contains the external A/D converter

control pin. The output latch corresponding to

a secondary function must be programmed to

a one (1) for that function to operate. The sec-

ondary function assigned to port 6:

– ADST(P4.0): external A/D converter start

pin

PE/SWD 4

75

I

Power saving mode enable/Start Watch-

dog Timer

A low level on this pin allows the software to

enter the power down, idle and slow down

mode. In case the low level is also seen during

reset, the watchdog timer function is off on de-

fault.

Use of the software controlled power saving

modes is blocked, when this pin is held on

high level. A high level during reset performs

an automatic start of the watchdog timer im-

mediately after reset.

When left unconnected this pin is pulled high

by a weak internal pull-up resistor.

RESET 10

1

V AREF1

11

3

VAGND

12

4

I

Reset pin

A low level on this pin for the duration of two

machine cycles while the oscillator is running

resets the SAB 80C515A. A small internal

pullup resistor permits power-on reset using

only a capacitor connected to V SS

Reference voltage for the A/D converter

Reference ground for the A/D converter

Semiconductor Group

6

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