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UPD17708 Datasheet(PDF) 280 Page - Renesas Technology Corp

Part # UPD17708
Description  MOS INTEGRATED CIRCUIT
PDF  358 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD17708 Datasheet(HTML) 280 Page - Renesas Technology Corp

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µPD17704, 17705, 17707, 17708, 17709
Figure 18-7. Configuration of IF Counter Gate Status Detection Register
Cautions 1.
Do not read the contents of the IF counter data register (IFC) to the data buffer while the
IFCGOSTT flag is set to 1.
2.
The gate of the external gate counter cannot be opened or closed by the IFCGOSTT flag. Use
the IFCSTRT flag to open or close the gate.
Name
Flag symbol
b3
0
b2
0
b1
0
b0
I
F
C
G
O
S
T
T
Address
21H
Read/Write
R
IF counter gate status
detection
0
1
Detects opening/closing of gate of frequency counter
When IF counter function is selected
When external gate counter
function is selected
Fixed to “0”
Power-ON reset
WDT&SP reset
CE reset
Clock stop
0
0
0
0
0
00
Sets IFCSTRT flag to “1” and is set to
1 until gate is closed
Sets IFCSTRT flag to “1” and is set to
1 while gate is open, regardless of
input of P2A0/FCG0 and P2A1/FCG1
pins



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