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IDTTM/ICSTM Voltage Monitor/Watchdog Timer Circuit
1568—05/30/08
Advance Information
ICS9WDV3501B
Voltage Monitor/Watchdog Timer Circuit
3
Advance Information
TSSOP Pin Configuration
TSSOP Pin Description
PIN #
(TSSOP)
PIN NAME
PIN TYPE
DESCRIPTION
1VMON1
PWR
Voltage Monitor Input, nominal 1.0V threshold
2
VMON0
IN
Voltage Monitor Input, nominal 1.0V threshold
3
VDDA
PWR
3.3V Analog Power Supply
4
WTB1
IN
Watchdog timout select bit. (MSB)
5
WTB0
IN
Watchdog timout select bit. (LSB)
6
WDI
IN
Watchdog Input
7
RP
IN
Resistor connection for internal oscillator
8
GND
Ground pin
9
*WDI_EN
IN
This input enables or disables the watchdog timer. 0 = Disable, 1 = Enable
10
RESET1#
OUT
RESET 1 output. Low = Reset, High = Normal Operation
11
RESET0#
OUT
RESET 0 output. Low = Reset, High = Normal Operation
12
VDD
PWR
3.3V Power Supply
13
RST0_SEL0
IN
RESET1 timeout period select (LSB)
14
RST0_SEL1
IN
RESET1 timeout period select (MSB)
15
RST1_SEL0
IN
RESET1 timeout period select (LSB)
16
RST1_SEL1
IN
RESET1 timeout period select (MSB)
17
GNDA
GND
Analog Ground
18
VMON4
IN
Voltage Monitor Input, nominal 1.0V threshold
19
VMON3
IN
Voltage Monitor Input, nominal 1.0V threshold
20
VMON2
IN
Voltage Monitor Input, nominal 1.0V threshold
VMON1 1
20 VMON2
VMON0 2
19 VMON3
VDDA 3
18 VMON4
WTB1 4
17 GNDA
WTB0 5
16 RST1_SEL1
WDI 6
15 RST1_SEL0
RP 7
14 RST0_SEL1
GND 8
13 RST0_SEL0
*WDI_EN 9
12 VDD
RESET1# 10
11 RESET0#
9W
DV35
01
20-pin TSSOP
pins preceded by '*' have 100kohm internal pull up.