DMM Analog front end with Inrush
The ID byte of ES51980 is header of “110010” followed by a buzzer on/off control bit and
R/W bit. The start/stop bit definition is shown on the diagram below.
ES51980(6000counts)
1.2 Read/Write command description
The write command includes one ID byte with four command bytes. If the valid write ID
code is received by ES51980 at any time, the write command operation will be enabled.
The next table shows the content of write command.
Byte
Bit7
Bit6
Bit5
Bit4
Bit3
ID
W1
W2
W3
W4
1
SHBP
B0
AC
0
1
F3
B1
0
0
0
F2
B2
0
IRQ
0
F1
C0
EXT
INA/IRV
1
F0
C1
FS60
IRR
0
Q2
FQ2
LPF1
OP0
Bit2
BUZ
Q1
FQ1
LPF0
OP1
Bit1
R/W=0
Q0
FQ0
FRES
EXT_ADP
Bit0
Auxiliary low-resistance detection control bit for Continuity and Diode modes:
SHBP
Measurement function control bit:
F3/F2/F1/F0
Range control bit for V/A/R/C modes:
Q2/Q1/Q0
Range control bit for Freq mode:
FQ2/FQ1/FQ0
Buzzer frequency selection:
B2/B1/B0
Buzzer driver ON/OFF control bit:
BUZ
ADC conversion rate control bit:
C1/C0
AC mode control enable bit:
AC
3dB BW for low-pass-filter selection:
LPF1/LPF0
External source for Diode mode control bit:
EXT
Inrush mode control bit:
INA
OP configuration control bit:
OP1/OP0
Frequency mode input resistance control bit:
FRES
ADP mode control bit:
EXT_ADP
ADP DC mode full scale control bit:
FS60
Insulation mode control bit:
IRQ/IRV/IRR
ver. 2.8
9
12/01/12
CYRUSTEK [ Cyrustek corporation ]
