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NCN5121MNTWG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P58
NCN5121
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13
<WDEN>
WD Timer
RESETB
Remarks:
− WD Timer is an internal timer
−t
WDTO
= <WDT[3:0]>
− <WDEN> and <WDT[3:0]> are Watchdog Register bits
Enable
Watchdog
Re−enable
Watchdog
t
WDPR
t
WDTO
>t
WDPR
and <t
WDTO
vt
WDPR
and wt
WDTO
t
WDRD
t
t
t
t
reset
Figure 9. Watchdog Timing Diagram
DO
CLK
DI
CS
t
SCK
t
SDI_SET
t
SDI_HOLD
t
CS _SET
t
SCK _HIGH
t
SCK _LOW
t
CS_HOLD
t
CS _HIGH
t
SDO_VALID
Figure 10. SPI Bus Timing Diagram
DO
CLK
DI
CS
TREQ
t
TREQ _SET
LSB 1 72
Dummy Dummy Dummy Dummy
t
TREQ _LOW
t
TREQ_HIGH
t
TREQ_HOLD
Figure 11. TREQ Timing Diagram
NCN5121
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14
TYPICAL APPLICATION SCHEMATICS
Figure 12. Typical Application Schematic, 8−bit UART Mode (38400bps), Single Supply, 20 mA Bus Current Limit and
1 mA/ms Bus Current Slopes, 8 MHz Microcontroller Clock Signal
NCN5121
VSSA
1
VBUS2
2
TXO
3
CCP
4
CAV
5
VBUS1
6
CEQ1
7
CEQ2
8
VFILT
9
VDD2MV
11
VDD2MC
12
VDD2
13
VSS2
14
VSW2
15
VIN
16
VSW1
17
VSS1
18
VDD1
19
VDD1M
20
XCLKC
21
TRIG
22
MODE1
23
TREQ
25
MODE2
24
CSB/UC1
26
SDI/RXD
27
SDO/TXD
28
V20V
10
SCK/UC2
29
VDDD
30
VSSD
31
XCLK
32
XSEL
33
XTAL2
34
XTAL1
35
SAVEB
36
RESETB
37
FANIN
38
ANAOUT
39
VDDA
40
3.3
C
5
D
1
R
1
C
1
C
3
C
4
C
7
C
2
L
1
C
10
3.3
3.3
C
9
C
8
A
B
GND
VCC
3.3
TxD
RxD
SAVEb
RESETb
R
2
X
1
uC CLK
3.3
C
6
D
2
NCN5121
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15
TYPICAL APPLICATION SCHEMATICS
Figure 13. Typical Application Schematic, SPI (500 kbps), Dual Supply, 10 mA Bus Current Limit and 0.5 mA/ms
Bus Current Slopes, 16 MHz Clock for Microcontroller
NCN5121
VSSA
1
VBUS2
2
TXO
3
CCP
4
CAV
5
VBUS1
6
CEQ1
7
CEQ2
8
VFILT
VDD2MV
11
VDD2MC
12
VDD2
13
VSS2
14
VSW2
15
VIN
16
VSW1
17
VSS1
18
VDD1
19
VDD1M
20
9
XCLKC
21
TRIG
22
MODE1
23
TREQ
25
MODE2
24
CSB/UC1
26
SDI/RXD
27
SDO/TXD
28
V20V
10
SCK/UC2
29
VDDD
VSSD
31
XCLK
32
XSEL
33
XTAL2
34
XTAL1
35
SAVEB
36
RESETB
37
FANIN
38
ANAOUT
39
VDDA
40
30
3.3
3.3
3.3
GND
VCC
3.3
SDO
SDI
SAVEb
RESETb
V2
V2
VCC2
SCK
SCB
uC CLK
TREQ
A
B
D
2
D
1
R
1
C
1
C
2
C
7
C
3
C
4
C
5
X
1
C
8
C
9
C
6
C
10
C
11
R
3
R
5
R
4
R
2
L
2
L
1
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P58

NCN5121MNTWG

Mfr. #:
Buy NCN5121MNTWG
Manufacturer:
ON Semiconductor
Description:
Communication ICs - Various KNXB
Lifecycle:
New from this manufacturer.
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