參數(shù)資料
型號： M37542F4FP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO36
封裝： 8.4 X 15 MM, 0.80 MM PITCH, PLASTIC, SSOP-36
文件頁數(shù)： 44/124頁
文件大小： 1238K
代理商： M37542F4FP
7542 Group
Rev.3.03
Jul 11, 2008
Page 24 of 117
REJ03B0006-0303
Termination of unused pins
Termination of common pins
I/O ports:
Select an input port or an output port and follow
each processing method.
Output ports: Open.
Input ports: If the input level become unstable, through current
flow to an input circuit, and the power supply current
may increase.
Pin
P00/CAP0
P01/CMP0
P02/CMP1
P03/TXOUT
P04/RxD2
P05/TxD2
P06/SCLK2
P07/SRDY2
P10/RxD1/CAP0
P11/TxD1
P12/SCLK1
P13/SRDY1
P14/CNTR0
P20/AN0–P27/AN7
P30/CAP1
P31/CMP2
P32/CMP3
P33/INT1
P34
P35
P36/INT1
P37/INT0
VREF
XIN
XOUT
Termination 1
(recommend)
I/O port
Connect to Vss.
When only on-chip
oscillator is used, connect
to VCC through a resistor.
When external clock is
input or when on-chip
oscillator is used, open.
Termination 2
When selecting CAP function, per-
form termination of input port.
When selecting CMP0 function,
perform termination of output port.
When selecting CMP1 function,
perform termination of output port.
When selecting TXOUT function,
perform termination of output port.
When selecting RxD2 function,
perform termination of input port.
When selecting TxD2 function,
perform termination of output port.
When selecting external clock input,
perform termination of output port.
When selecting SRDY2 function,
perform termination of output port.
When selecting RxD1 function,
perform termination of input port.
When selecting TxD1 function,
perform termination of output port.
When selecting external clock input,
perform termination of input port.
When selecting SRDY1 function,
perform termination of output port.
When selecting CNTR input function,
perform termination of input port.
When selecting AN function, per-
form termination of input port.
When selecting CAP function, per-
form termination of input port.
When selecting CMP2 function,
perform termination of output port.
When selecting CMP3 function,
perform termination of output port.
When selecting INT function, per-
form termination of input port.
-
When selecting INT function, per-
form termination of input port.
When selecting INT function, per-
form termination of input port.
-
Termination 3
-
When selecting internal clock output,
perform termination of output port.
-
When selecting CAP function, per-
form termination of input port.
-
When selecting internal clock output,
perform termination of output port.
-
When selecting CNTR output function,
perform termination of output port.
-
Termination 4
When selecting
key-on wakeup
function, per-
form termination
of input port.
-
Table 7 Termination of unused pins
Especially, when expecting low consumption current
(at STP or WIT instruction execution etc.), pull-up or
pull-down input ports to prevent through current
(built-in resistor can be used).
We recommend processing unused pins through a
resistor which can secure IOH(avg) or IOL(avg).
Because, when an I/O port or a pin which have an
output function is selected as an input port, it may
operate as an output port by incorrect operation etc.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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