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UPD17708 데이터시트(PDF) 216 Page - NEC

부품명 UPD17708
상세설명  4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  356 Pages
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제조업체  NEC [NEC]
홈페이지  http://www.nec.com/
Logo NEC - NEC

UPD17708 데이터시트(HTML) 216 Page - NEC

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16. SERIAL INTERFACES
16.1 Outline of Serial Interfaces
Figure 16-1 outlines the serial interfaces.
Table 16-1 classifies the serial interfaces and shows their communication modes.
As shown in Figure 16-1, two serial interfaces, 0 (SIO0) and 1 (SIO1), are available.
Serial interfaces 0 and 1 can be used at the same time.
Serial interface 0 can be used in two modes: 2-wire and 3-wire modes. In the 2-wire mode, two pins, SDA and
SCL, are used. In the 3-wire mode, three pins, SCK0, SO0, and SI0, are used.
In the 2-wire mode, two communication modes, I2C bus and serial I/O modes, can be selected.
Serial interface 1 can be used only in 3-wire mode, and uses three pins, SCK1, SO1, and SI1. The communication
mode is the serial I/O mode.
Figure 16-1. Outline of Serial Interfaces
Serial interface 0
4.5 MHz
Presettable shift register 0
(SIO0SFR)
Clock control block
SDA/P0A3
SCL/P0A2
SCK0/P0A1
SO0/P0A0
SI0/P0B3
Interrupt control block
IRQSIO0 flag
Serial interface 1
4.5 MHz
Presettable shift register 1
(SIO1SFR)
Clock control block
SCK1/P0B2
SO1/P0B1
SI1/P0B0
IRQSIO1 flag



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