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UPD17708 Scheda tecnica(PDF) 223 Page - Renesas Technology Corp

Il numero della parte UPD17708
Spiegazioni elettronici  MOS INTEGRATED CIRCUIT
PDF  358 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD17708 Scheda tecnica(HTML) 223 Page - Renesas Technology Corp

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µPD17704, 17705, 17707, 17708, 17709
16.2.3 Clock control block
The clock control block controls generation of a clock when the internal clock is used (master operation) and clock
output timing.
The frequency fSC of the internal clock is set by the SIO0CK1 and SIO0CK0 flags of the serial I/O0 clock selection
register.
Figure 16-4 shows the configuration of the serial I/O0 clock selection register.
The shift clock output from the clock control block is valid only for the master operation (SIO0MS flag = 1).
For the clock generation timing, refer to the description of each communication mode.
Figure 16-4. Configuration of Serial I/O0 Clock Selection Register
Name
Flag symbol
b3
0
b2
S
B
M
D
b1
S
I
O
0
C
K
1
b0
S
I
O
0
C
K
0
Address
0BH
Read/Write
R/W
Serial I/O0 clock selection
Power-ON reset
WDT&SP reset
CE reset
Clock stop
00
0
0
0
0
0
0
0
0
0
0
0
93.75 kHz
375.00 kHz
281.25 kHz
46.875 kHz
Selects internal shift clock frequency fSC of serial interface 0
Continues processing
Slave reception mode is set automatically if acknowledge signal is not
received (fixed to “1” when serial I/O is selected)
Selects operation mode during slave transmission of I2C bus
Fixed to “0”
0
1
0
0
1
1
0
1
0
1



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