參數資料
型號: μPD784031
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位微控制器)
文件頁數: 38/90頁
文件大?。?/td> 301K
代理商: ΜPD784031
μ
PD784031
38
(2) Three-wire serial I/O mode
In this mode, the master device makes the serial clock active to start transmission, then transfers 1-byte data
in phase with the clock.
This mode is designed for communication with a device incorporating a conventional synchronous serial interface.
Basically, three lines are used for communication: the serial clock line (SCK) and the two serial data lines (SI
and SO).
In general, a handshake line is required to check the state of communication.
Figure 8-11. Block Diagram of Three-Wire Serial I/O Mode
Serial clock counter
SIO1, SIO2
SI1, SI2
SO1, SO2
SCK1, SCK2
f
XX
/2
INTCSI1,
INTCSI2
Shift register
Output latch
Direction control
circuit
Internal bus
Serial clock
control circuit
S
1/m
1/2
n+1
Interrupt signal
generator
Remark
f
XX
: Oscillator frequency or external clock input
n = 0 to 11
m = 1, 16 to 30
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