參數(shù)資料
型號(hào)： μPD780034
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述： 8位單片機(jī)微控制器（8位單片微控制器）
文件頁(yè)數(shù)： 26/44頁(yè)
文件大?。?/td> 238K
代理商： ΜPD780034
26
m
PD780031, 780032, 780033, 780034
(2) Serial interface SIO3n (n = 0, 1)
The serial interface SIO3n has the 3-wire serial I/O mode.
3-wire serial I/O mode (fixed as MSB first)
This is an 8-bit data transfer mode using three lines: a serial clock line (SCK3n), serial output line (SO3n),
and serial input line (SI3n).
Since simultaneous transmit and receive operations are enabled in the 3-wire serial I/O mode, the
processing time for data transfer is reduced.
The first bit in 8-bit data in the serial transfer is fixed as MSB.
The 3-wire serial I/O mode is useful for connection to a peripheral I/O device that includes a clocked serial
interface, a display controller, etc.
Figure 5-10. Block Diagram of Serial Interface SIO3n
Internal bus
8
8
Direction control circuit
Serial clock
control circuit
Serial clock
counter
Interrupt
generation circuit
Selector
Serial I/O shift register
3n (SIO3n)
SI3n
SO3n
SCK3n
INTCSI3n
f
X
/2
3
f
X
/2
4
f
X
/2
5
Remark
n = 0, 1
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