參數(shù)資料
型號: SAB-C505-LM
廠商: SIEMENS A G
元件分類: 微控制器/微處理器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, MQFP-44
文件頁數(shù): 13/85頁
文件大?。?/td> 487K
代理商: SAB-C505-LM
C505L
Data Sheet
11
06.99
P1.0-P1.7
71-78
71
72
73
74
75
76
77
78
I/O
Port 1
is an 8-bit quasi-bidirectional port with internal pull-up
arrangement. Port 1 pins can be used for digital input/output
or as analog inputs to the A/D converter. Port 1 pins that
have a 1 written to them are pulled high by internal pull-up
transistors and in that state can be used as inputs. As
inputs, port 1 pins being pulled low externally will source
current (
I
IL
, in the DC characteristics) because of the internal
pullup transistors. Port 1 pins are assigned to be used as
analog inputs via the register P1ANA.
As secondary digital functions, port 1 contains the interrupt,
timer, clock, capture and compare pins. The output latch
corresponding to a secondary function must be
programmed to a one (1) for that function to operate (except
for compare functions). The secondary functions are
assigned to the pins of port 1 as follows:
P1.0 / AN0 / INT3 / CC0
Analog input channel 0
interrupt 3 input /
capture/compare channel 0 I/O
Analog input channel 1/
interrupt 4 input /
capture/compare channel 1 I/O
Analog input channel 2 /
interrupt 5 input /
capture/compare channel 2 I/O
Analog input channel 3
interrupt 6 input /
capture/compare channel 3 I/O
Analog input channel 4
Analog input channel 5 / timer 2
external reload / trigger input
Analog input channel 6 /
system clock output
Analog input channel 7 /
timer/counter 2 input
P1.1 / AN1 / INT4 / CC1
P1.2 / AN2 / INT5 / CC2
P1.3 / AN3 / INT6 / CC3
P1.4 / AN4
P1.5 / AN5 / T2EX
P1.6 / AN6 / CLKOUT
P1.7 / AN7 / T2
*) I = Input
O= Output
Table 1
Pin Definitions and Functions
(cont’d)
Symbol
Pin Number
I/O*)
Function
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