SAB80C537 INFINEON [Infineon Technologies AG], SAB80C537 Datasheet - Page 14

• Manufacturer Part Number: SAB80C537
• Description: 8-Bit CMOS Single-Chip Microcontroller
• Manufacturer: INFINEON [Infineon Technologies AG]

Pin Definitions and Functions (cont’d)
Symbol
P6.0 - P6.7
P8.0 - P8.3
*
Semiconductor Group
I = Input
O = Output
P-LCC-84
70 - 77
78 - 81
Pin Number
P-MQFP-100-2
46 - 50,
54 - 56
57 - 60
13
I/O
I/O
I
*)
Function
Port 6
is a bidirectional I/O port with internal
pull-up resistors. Port 6 pins that have
1 s written to them are pulled high by
the internal pull-up resistors, and in that
state can be used as inputs. As inputs,
port 6 pins being externally pulled low
will source current (I
DC characteristics) because of the
internal pull-up resistors. Port 6 also
contains the external A/D converter
control pin and the transmit and receive
pins for serial channel 1. 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:
– ADST (P6.0): external A/D converter
– R D1 (P6.1): receiver data input of
– T D1 (P6.2): transmitter data output
Port 8
is a 4-bit unidirectional input port. Port
pins can be used for digital input, if
voltage levels meet the specified input
high/low voltages, and for the higher
4-bit of the multiplexed analog inputs of
the A/D converter, simultaneously
start pin
serial interface 1
of serial interface 1
SAB 80C517/80C537
IL
, in the