參數(shù)資料
型號: UPD784908
廠商: NEC Corp.
英文描述: 16-BIT SINGLE-CHIP MICROCONTROLLER
中文描述: 16位單片機
文件頁數(shù): 81/98頁
文件大小: 657K
代理商: UPD784908
μ
PD784907, 784908
Data Sheet U11680EJ2V0DS00
81
A/D Converter Characteristics (T
A
= –40 to +85
°
C, V
DD
= AV
DD
= AV
REF1
= 3.5 to 5.5 V, V
SS
= AV
SS
= 0 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Resolution
8
bit
Total error
Note
IEAD = 00H
0.6
%
FR = 1
1.5
%
IEAD = 01H
V
DD
= 4.5 to 5.5 V
1
2.2
%
Quantization error
±
1/2
LSB
Conversion time
t
CONV
FR = 1 120/f
CLK
9.5
480
μ
s
FR = 0 240/f
CLK
19.1
960
μ
s
Sampling time
t
SAMP
FR = 1 18/f
CLK
1.4
72
μ
s
FR = 0 36/f
CLK
2.9
144
μ
s
Analog input impedance
R
AN
1,000
M
AV
REF1
impedance
R
REF1
3
10
k
AV
DD
power supply current
AI
DD1
CS = 1
2.0
5.0
mA
AI
DD2
CS = 0, STOP mode
1.0
20
μ
A
Note
Quantization error is not included. This parameter is indicated as the ratio to the full-scale value.
Caution
To execute the conversion by the A/D converter set port 7, multiplexed with the A/D input lines,
to output mode to prevent data from being inverted.
Remark
f
CLK
: system clock frequency (selectable from f
XX
, f
XX
/2, f
XX
/4, and f
XX
/8 by the standby control register
(STBC))
IEBus Controller Characteristics (T
A
= –40 to +85
°
C, V
DD
= AV
DD
= AV
REF1
= 4.5 to 5.5 V, AV
SS
= V
SS
= 0 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
IEBus standard
frequency
Note 1
f
S
Transfer speed: mode 1
6.20
6.29
6.39
MHz
Driver delay time (from
TX output to bus line)
Note 2
t
DTX
C
L
= 50 pF
Note 3
1.5
μ
s
Receiver delay time (from t
DRX
bus line to RX input)
Note 2
0.7
μ
s
Transmission delay on
bus
Note 2
t
DBUS
0.85
μ
s
Notes 1.
The value conforms to the IEBus standard. The IEBus controller is operable within the range of the
oscillator frequency of oscillator characteristics.
2.
IEBus system clock: The value is measured when f
X
= 6.29 MHz.
3.
C is the load capacitance of TX output line.
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