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UPD17708 Datasheet(PDF) 300 Page - NEC

No. de pieza UPD17708
Descripción Electrónicos  4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  356 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
Logo NEC - NEC

UPD17708 Datasheet(HTML) 300 Page - NEC

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Figure 20-3. Stop Releasing Conditions
Operand
STOP s (4 bits)
b3 b2
b1 b0
0
1
Releases when high level is input to port 0D
Undefined (Fix this bit to “0”.)
Undefined (Fix this bit to “0”.)
Released by interrupt of falling edge of INT0 through INT4 pins and CE pin
Not released even if condition is statisfied
Released if condition is satisfied
Specifies stop status releasing condition
The “STOP s” instruction is executed as a “NOP” instruction when the CE pin rises and when the CE reset counter
operates.
The operating status of the CE reset counter can be detected by the CECNTSTT flag (for the CE reset counter,
refer to 21. RESET).
20.3.4 Releasing clock stop status by high level input of port 0D
Figure 20-4 illustrates how the clock stop status is released by the high level input to port 0D.
Figure 20-4. Releasing Clock Stop Status By High Level Input of Port 0D
VDD
P0D
XOUT
5 V
0 V
H
L
2.2 V
STOP s instruction
Starts from instruction next to
STOP s
Oscillation stops
tSET/2
HALT period
tSET: basic timer 0 setting time
20.3.5 Cautions on releasing clock stop status
For the cautions on releasing the clock stop status, refer to (2) Releasing from clock stop status in 21.4.4
Cautions on raising supply voltage VDD.



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