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参数资料
| 型号： | M37544G2SP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件页数： | 50/68页 |
| 文件大小： | 738K |
| 代理商： | M37544G2SP |
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7544 Group
Rev.1.04
2004.06.08
page 54 of 66
REJ03B0012-0104Z
A/D Converter Characteristics
Table 14 A/D Converter characteristics (VCC = 4.0 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Resolution
Absolute accuracy
(quantification error excluded)
Conversion time
Ladder resistor
Reference power source
input current
A/D port input current
Min.
Typ.
Max.
Symbol
Parameter
Limits
Unit
Test conditions
Ta = –20 to 85 °C, Vcc = VREF
VREF = 5.0 V
VREF = 3.0 V
Bits
LSB
tc(XIN)
k
A
8
±3
109
200
120
5.0
—
ABS
tCONV
RLADDER
IVREF
II(AD)
37
135
80
50
30
Timing Requirements
Table 15 Timing requirements (VCC = 4.0 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Min.
Typ.
Max.
Symbol
Parameter
Limits
Unit
Reset input “L” pulse width
External clock input cycle time
External clock input “H” pulse width
External clock input “L” pulse width
CNTR0 input cycle time
CNTR0, INT0, INT1, input “H” pulse width
CNTR0, INT0, INT1, input “L” pulse width
CNTR1 input cycle time
CNTR1 input “H” pulse width
CNTR1 input “L” pulse width
Serial I/O clock input cycle time (Note)
Serial I/O clock input “H” pulse width (Note)
Serial I/O clock input “L” pulse width (Note)
Serial I/O input set up time
Serial I/O input hold time
2
125
50
200
80
2000
800
370
220
100
s
ns
Note: In this time, bit 6 of the serial I/O control register (address 001A16) is set to “1” (clock synchronous serial I/O is selected).
When bit 6 of the serial I/O control register is “0” (clock asynchronous serial I/O is selected), the rating values are divided by 4.
______
tW(RESET)
tC(XIN)
tWH(XIN)
tWL(XIN)
tC(CNTR0)
tWH(CNTR0)
tWL(CNTR0)
tC(CNTR1)
tWH(CNTR1)
tWL(CNTR1)
tC(SCLK)
tWH(SCLK)
tWL(SCLK)
tsu(RxD–SCLK)
th(SCLK–RxD)
Note: As for AD translation accuracy, on the following operating conditions, accuracy may become low.
(1) Since the analog circuit inside a microcomputer becomes sensitive to noise when VREF voltage is set up lower than Vcc voltage,
accuracy may become low rather than the case where VREF voltage and Vcc voltage are set up to the same value..
(2) When VREF voltage is less than [ 3.0V ], the accuracy at the time of low temperature may become extremely low compared with
the time of room temperature. The use beyond VREF=3.0V is recommended in the system the use by the side of low temperature
is assumed to be.
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