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LC72358N 数据表(PDF) 8 Page - Sanyo Semicon Device

部件名 LC72358N
功能描述  Single-Chip PLL Microcontrollers
Download  13 Pages
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制造商  SANYO [Sanyo Semicon Device]
网页  https://www.sanyo-av.com/us/
标志 SANYO - Sanyo Semicon Device

LC72358N 数据表(HTML) 8 Page - Sanyo Semicon Device

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No. 5065-8/13
LC72358N, 72362N, 72366
Continued on next page.
Pin No.
Symbol
I/O
I/O type
Function
70
69
68
HCTR
LCTR
SNS
I
I
I
Input
Input
Input
Universal counter/general-purpose input shared-function input port
The IOS instruction b3 with PWn = 3 switches the pin function between universal counter
input and general-purpose input.
• Frequency measurement
The universal counter function is selected by an IOS instruction with PWn = 3 and b3 = 0.
HCTR frequency measurement mode is set up by a UCS instruction with b3 = 0 and b2 =
0, and counting is started with a UCC instruction after the count time is selected.
The CNTEND flag is set when the count completes.
To operate this circuit as an AC amplifier in this mode, the input must be capacitor
coupled.
• General-purpose input pin use
The general-purpose input port function is selected by an IOS instruction with PWn = 3
and b3 = 1.
An internal register (address: 0EH) input instruction INR (b0) is used to acquire data from
this pin.
Input is disabled in clock stop mode. (The input pin will be pulled down.)
During the power-on reset, the universal counter function is selected.
Universal counter (frequency and period measurement)/general-purpose input shared-
function input port
The IOS instruction b2 with PWn = 3 switches the pin function between universal counter
input and general-purpose input.
• Frequency measurement
The universal counter function is selected by an IOS instruction with PWn = 3 and b2 = 0.
LCTR frequency measurement mode is set up by a UCS instruction with b3 = 0 b2 = 1,
and counting is started with a UCC instruction after the count time is selected.
The CNTEND flag is set when the count completes.
To operate this circuit as an AC amplifier in this mode, the input must be capacitor
coupled.
• Period measurement
With the universal counter function selected, set up period measurement mode with a
UCS instruction with b3 = 1 and b2 = 0, and start the count with a UCC instruction after
selecting the count time. The CNTEND flag will be set when the count completes. In this
mode, the signal must be input with DC coupling to turn off the bias feedback resistor.
• General-purpose input pin use
The general-purpose input port function is selected by an IOS instruction with PWn = 3,
b2 = 1.
An internal register (address: 0EH) input instruction INR (b1) is used to acquire data from
this pin.
Input is disabled in clock stop mode. (The input pin will be pulled down.)
During the power-on reset, the universal counter function (in HCTR frequency
measurement mode) is selected.
Voltage sense/general-purpose input pin shared-function port
This circuit is designed for a relatively low input threshold voltage.
• Voltage sense pin usage
This input pin is used to determine whether or not a power failure occurred after recovery
from backup (clock stop) mode. An internal sense F/F is used for this determination. The
sense F/F is tested with a TUL instruction (b2).
• General-purpose input port usage
When used as a general-purpose input port, the state is sensed by using a TUL
instruction (b3).
Since, unlike other input ports, input is not disabled in clock stop mode and during the
power-on reset, special care is required with respect to through currents.


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