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參數(shù)資料
| 型號： | GMS97L54 |
| 廠商： | HYNIX SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 7/39頁 |
| 文件大小： | 254K |
| 代理商： | GMS97L54 |
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8-Bit CMOS Microcontorller
GMS97C2051/L2051
HYUNDAI MicroElectonics
7
Figure 3
. Time/Counter 0 and 1 Input Clock Logic
Serial Interface (USART)
The serial port is full duplex, meaning it can trans-
mit and receive simultaneously. And it can operate
in four modes (one synchronous mode, three asyn-
chronous mode) as illustrated in
table 5
. The possi-
Table 5
. USART Operating Modes
ble baud rates can be calculated using the formulas
given in
table 6
.
Mode
SCON
Baud Rate
Description
SM0
0
SM1
0
0
fosc / 12
( fixed )
Shift Register
: Serial data enters and exits through RXD.
TXD outputs the shift clock.
Eight data bits are transmitted / received,
with the LSB first.
8-bit UART
: Ten bits are transmitted through TXD, or
received through RXD
a start bit (0), 8 data bits (LSB first),
and a stop bit (1)
9-bit UART
: Eleven bits are transmitted through TXD,
or received through RXD
a start bit (0), 8 data bits (LSB first),
a programmable ninth data bit ,
and a stop bit (1)
9-bit UART
: The same as Mode 2 except the variable
baud rate.
1
0
1
Set by Timer
( variable )
2
1
0
fosc / 64 or fosc / 32
( fixed )
3
1
1
Set by Timer
( variable )
fosc
12
P3.4/T0
P3.5/T1
max fosc/24
TR 0/1
TCON
Gate
TMOD
=1
1
&
0
1
fosc/12
Timer 0/1
Input Clock
Control
C/T
TMOD
P3.2/INT0
P3.3/INT1
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