參數(shù)資料
型號: MC80C0224
廠商: Electronic Theatre Controls, Inc.
元件分類: 8位微控制器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數(shù): 76/128頁
文件大?。?/td> 1408K
代理商: MC80C0224
MC80F0208/16/24
Preliminary
72
MAR. 2005 Ver 0.2
16. SERIAL INPUT/OUTPUT (SIO)
The serial Input/Output is used to transmit/receive 8-bit data se-
rially. The Serial Input/Output(SIO) module is a serial interface
useful for communicating with other peripheral of microcontrol-
ler devices. These peripheral devices may be serial EEPROMs,
shift registers, display drivers, A/D converters, etc. This SIO is 8-
bit clock synchronous type and consists of serial I/O data register,
serial I/O mode register, clock selection circuit, octal counter and
control circuit as illustrated in Figure 16-1. The SO pin is de-
signed to input and output. So the Serial I/O(SIO) can be operated
with minimum two pin. Pin R42/SCK, R43/SI, and R44/SO pins
are controlled by the Serial Mode Register. The contents of the
Serial I/O data register can be written into or read out by software.
The data in the Serial Data Register can be shifted synchronously
with the transfer clock signal.
Figure 16-1 SIO Block Diagram
÷
4
÷
16
X
IN
PIN
P
MUX
SCK[1:0]
00
01
10
11
SCK PIN
SIO
Shift
Input shift register
SIOR
Clock
Clock
Octal
Counter
(3-bit)
Serial communication
Interrupt
SIOIF
Internal Bus
SIOSF
SCK[1:0]
“11”
overflow
not “11”
Complete
Timer0
Overflow
SI PIN
IOSW
SO PIN
SOUT
IOSW
CONTROL
CIRCUIT
“0”
“1”
POL
1
0
Start
SIOST
clear
SM0
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