參數(shù)資料
型號: M30220FCGP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP144
封裝: 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁數(shù): 152/161頁
文件大?。?/td> 0K
代理商: M30220FCGP
82
EPSON
S1C88832/88862 TECHNICAL MANUAL
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (Programmable Timer)
Fig. 5.10.8.3 TOUT output waveform
5.10.9 Transmission rate setting of
serial interface
The underflow signal of the timer 1 can be used to
clock the serial interface.
The transmission rate setting in this case is made in
registers PSC1X and PLD1X, and is used to set the
count mode to the reload count mode (RLMD1 =
"1").
Since the underflow signal of the timer 1 is divided
by 1/32 in the serial interface, the value set in
register RLD1X which corresponds to the transmis-
sion rate is shown in the following expression:
RLD1X = fosc / (32*bps*4PSC1X) - 1
fosc:
Oscillation frequency (OSC1/OSC3)
bps:
Transmission rate
PSC1X:
Setting value to the register PSC1X (0–3)
(00H can be set to RLD1X)
Table 5.10.9.1 shows an example of the transmis-
sion rate setting when the OSC3 oscillation circuit is
used as a clock source.
Table 5.10.9.1 Example of transmission rate setting
The output control for the TOUT (TOUT) signal is
done by the register PTOUT. When you set "1" for
the PTOUT, the TOUT (TOUT) signal is output
from the R27 (R26) output port terminal. When "0"
is set, the R27 goes HIGH (VDD) and the R26 goes
LOW (VSS).
To output the TOUT signal, "1" must always be set
for the data register R27D. The data register R26D
does not affect the TOUT output.
Since the TOUT signal is generated asynchronously
from the register PTOUT, when the signal is turned
ON or OFF by the register setting, a hazard of a 1/2
cycle or less is generated.
Figure 5.10.8.3 shows the output waveform of
TOUT signal.
Transfer rate
(bps)
9,600
4,800
2,400
1,200
600
300
150
OSC3 oscillation frequency / Programmable timer settings
fOSC3 = 3.072 MHz
PSC1X
0 (1/1)
1 (1/4)
RLD1X
09H
13H
27H
4FH
9FH
4FH
9FH
fOSC3 = 4.608 MHz
PSC1X
0 (1/1)
1 (1/4)
RLD1X
0EH
1DH
3BH
77H
EFH
77H
EFH
fOSC3 = 4.9152 MHz
PSC1X
0 (1/1)
1 (1/4)
RLD1X
0FH
1FH
3FH
7FH
FFH
7FH
FFH
PTOUT
TOUT output (R27)
TOUT output (R26) *
01
when selected by mask option
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