參數(shù)資料
型號(hào): μPD784225Y
廠商: NEC Corp.
英文描述: 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
中文描述: 16位單片機(jī)微控制器(16位單片微控制器)
文件頁(yè)數(shù): 39/68頁(yè)
文件大?。?/td> 278K
代理商: ΜPD784225Y
39
μ
PD784224Y, 784225Y
(2)
3-wire serial I/O mode
In this mode, the master device starts transfer by making the serial clock active and transfers 1-byte data
in synchronization with this clock.
This mode is used to communicate with a device having the conventional clocked serial interface. Basically,
communication is established by using three lines: serial clocks (SCK1 and SCK2), serial data inputs (SI1
and SI2), and serial data outputs (SO1 and SO2). To connect two or more devices, a handshake line is
necessary.
Figure 7-11. Block Diagram in 3-wire Serial I/O Mode
Internal bus
8
8
Direction control circuit
Interrupt
generation circuit
Selector
Serial clock
counter
Serial clock
control circuit
Serial I/O shift register
1, 2 (SIO1, SIO2)
SI1, SI2
SO1, SO2
SCK1, SCK2
INTCSI1,
INTCSI2
INTTM2
f
XX
/8
f
XX
/16
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