參數(shù)資料
型號: SAF-C517A
廠商: INFINEON TECHNOLOGIES AG
元件分類: 8位微控制器
英文描述: 8-bit CMOS MICROCONTROLLER
中文描述: 8位CMOS單片機(jī)
文件頁數(shù): 13/72頁
文件大?。?/td> 845K
代理商: SAF-C517A
Semiconductor Group
11
C517A
P4.0 - P4.7
64 - 66,
68 - 72
1 - 3,
5 - 9
I/O
Port 4
is an 8-bit quasi-bidirectional I/O port with
internal pull-up resistors. Port 4 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
4 pins being externally pulled low will source
current (
I
IL
, in the DC characteristics)
because of the internal pull-up resistors.
Port 4 also serves as alternate compare
functions. 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 4 as follows :
P4.0 - P4.7 CM0 - CM7
Compare
channel 0 - 7
PE/SWD
67
4
I
Power saving mode
enable / Start
watchdog timer
A low level at this pin allows the software to
enter the power saving modes (idle mode,
slow down mode, and power down mode).
In case the low level is also seen during
reset, the watchdog timer function is off on
default.
Usage of the software controlled power
saving modes is blocked, when this pin is
held at high level. A high level during reset
performs an automatic start of the watchdog
timer immediately after reset.
When left unconnected this pin is pulled
high by a weak internal pull-up resistor.
During hardware power down the pullup
resisitor is switched off.
*) I = Input
O = Output
Table 1
Pin Definitions and Functions
(cont’d)
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相關(guān)PDF資料
PDF描述
SAF-C517A-L 8 BIT CMOS MICROCONTROLLER
SAF-C517A-LM 8-Bit CMOS Microcontroller
SABC517A-LN 8 BIT CMOS MICROCONTROLLER
SAB-R3020 WRITE BUFFER
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