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參數(shù)資料
| 型號(hào)： | S1C62920D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 1.3 MHz, MICROCONTROLLER, UUC63 |
| 封裝： | DIE-63 |
| 文件頁數(shù)： | 24/78頁 |
| 文件大?。?/td> | 874K |
| 代理商： | S1C62920D |
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22
EPSON
S1C62920 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
4.5.3 Control of output ports
Table 4.5.3.1 lists the output ports' control bits and their addresses.
Table 4.5.3.1 Control bits of output ports
Address
Comment
Register
D3
D2
D1
D0
Name
Init
1
0
*1
*7
R00
R03
(BZ)
R02
(FOUT)
R01
R00
0
High
On
High
On
High
Low
Off
Low
Off
Low
R01
R02
(FOUT)
R03
(BZ)
A0H
Output port R03
BZ On/Off (selected by mask option)
Output port R02
FOUT On/Off (selected by mask option)
Output port R01
Output port R00
R/W
*1 Initial value at the time of initial reset
*5 Constantly "0" when being read
*2 Not set in the circuit
*6 Refer to main manual
*3 Undefined
*7 Page switching in I/O memory is not necessary
*4 Reset (0) immediately after being read
When not using as special output ports
R00–R03: Output port data (A0H)
Sets the output data for the output ports.
When "1" is written:
High output
When "0" is written:
Low output
Reading:
Valid
The output port terminals output the data written in the corresponding registers (R00–R03) without
changing it. When "1" is written in the register, the output port terminal goes high (VDD), and when "0" is
written, the output port terminal goes low (VSS).
At initial reset, these registers are set to "0".
When using as special output ports
FOUT (R02)
In order for the S1C62920 to provide a clock signal to an external device, the FOUT signal can be output
from the R02 terminal by setting the mask option.
When FOUT output has been set, turning the FOUT signal ON and OFF can be controlled using the R02
register.
When the R02 register is set to "1", the FOUT signal is output from the R02 terminal. When "0" is set, the
R02 terminal goes low level (VSS).
FOUT signal frequency can be selected from among 4 types as shown below by setting the mask option.
(1) 512 Hz
(2) 4,096 Hz
(3) fOSC1 (OSC1 oscillation frequency)
(4) fOSC3 (OSC3 oscillation frequency)
Note: FOUT signal frequency that is selected is also used for the clock source in the master mode of the
serial interface. Therefore, any one of the 4 types of frequency must be selected for the serial
interface even if "FOUT is not used" is selected by the mask option.
See Section 4.9, "Serial Interface" for details.
A hazard may occur when the FOUT signal is turned ON or OFF.
Figure 4.5.3.1 shows the output waveform of FOUT.
Fig. 4.5.3.1 Output waveform of FOUT
R02 register
FOUT output (R02)
01
0
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