參數資料
型號： UPD784908
廠商： NEC Corp.
英文描述： 16-BIT SINGLE-CHIP MICROCONTROLLER
中文描述： 16位單片機
文件頁數： 46/98頁
文件大小： 657K
代理商： UPD784908
μ
PD784907, 784908
46
Data Sheet U11680EJ2V0DS00
Serial clock counter
SIO1, SIO2
SI1, SI2
SO1, SO2
SCK1, SCK2
f
XX
INTCSI1,
INTCSI2
Shift register
Output latch
Direction control
circuit
Internal bus
Serial clock
control circuit
S
1/m
1/2
n+1
Interrupt
generator
(2) 3-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 synchronization with this 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 8-12. Block Diagram of 3-Wire Serial I/O Mode
Remark
f
XX
: Oscillating frequency or external clock input frequency
n = 0 to 11
m = 1, 16 to 30
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