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參數(shù)資料
| 型號： | S1C621C0D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 1.3 MHz, MICROCONTROLLER, UUC74 |
| 封裝： | DIE-74 |
| 文件頁數(shù)： | 67/108頁 |
| 文件大小： | 992K |
| 代理商： | S1C621C0D |
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S1C621C0 TECHNICAL MANUAL
EPSON
53
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (R/F Converter)
4.10 R/F Converter
4.10.1 Configuration of R/F converter
The S1C621C0 has CR oscillation type R/F converter.
Two systems (two sensor connection terminals: SEN0, SEN1) of CR oscillation circuit are built into this R/F
converter, so it is possible to compose two types of R/F conversion circuits by connecting different resistive
sensors to each CR oscillation circuit.
Each of the R/F conversion circuits uses the same CR oscillation circuit and the same external reference
resistance. The R/F conversion circuit to be used is selected by the software.
Resistance value (relative value to external reference resistance) of the resistive sensor that has been
connected to the sensor input terminal is converted into frequency by the CR oscillation circuit and the
number of clocks is counted in the built-in measurement counter. By reading the value of the measurement
counter, it can obtain the data after digitally-converting the value detected by the sensor.
Various sensor circuits such as temperature measurement circuits using a thermistor can be easily realized
using this R/F converter.
The configuration of the R/F converter is shown in Figure 4.10.1.1.
Interrupt
request
16-bit time base counter
CR oscillation control circuit
Measurement counter
Data bus
Interrupt
control
circuit
Clock
selection
OVTBC
OVMC
MC00
–MC03
MC04
–MC07
MC08
–MC11
SENS0
DBGOS
OSC1
oscillation circuit
OSC3
oscillation circuit
fOSC1
fOSC3
RFCLK
RFRUN
REF
VSS
VDD
RFDBG
MC12
–MC15
SEN0
SEN1
RFIN
RFOUT
Fig. 4.10.1.1 Configuration of R/F converter
4.10.2 Connection terminals and CR oscillation circuit
The S1C621C0 has the connecting terminals for one reference resistance and two sensors so that two R/F
converters can be configured.
Figure 4.10.2.1 shows the connection diagram of external elements.
S1C621C0
VDD
RFOUT
RFIN
SEN1
SEN0
REF
Sensor
Reference resistance
RSEN1
RSEN0
RREF
CRF
RSEN0, RSEN1
RREF
CRF
: Resistive sensor
: Reference resistance
: Capasitor
Fig. 4.10.2.1 R/F converter external connection diagram
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