Name That Chip! (FBS3 Key Circuit Board)
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From: St. Louis, MO, United States of America
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Name That Chip! (FBS3 Key Circuit Board)
Hey guys,
I'm curious if anyone can tell me precisely what it is that each of these three chips do:
Later,
Tom
I'm curious if anyone can tell me precisely what it is that each of these three chips do:
Later,
Tom
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Joined: Mar 2007
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From: Chicago, IL
ML350, Lotus Elise
1. crystal
2. RF front end decoder chip: this is a custom chip that takes the signal direct from the antenna and does IF filtering as well as decoding and then supplies a serial data output for the microcontroller
3. NEC 8 bit microcontroller 78K0s series: this is the actual controller chip, actually a 'secure' version of the standard microcontroller. this holds the code that controls the code hopping algorithm as well as the individual ID codes for each transmitter.
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Joined: Mar 2007
Posts: 615
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From: Chicago, IL
ML350, Lotus Elise
the crystal acts as the system clock for both the microcontroller and to provide oscillator reference to the RF chip: it provides a base frequency upon which it can create other frequencies to lock onto the RF data carrier.
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Joined: Nov 2008
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From: South Texas
c230 2005 kompressor
1. crystal
2. RF front end decoder chip: this is a custom chip that takes the signal direct from the antenna and does IF filtering as well as decoding and then supplies a serial data output for the microcontroller
3. NEC 8 bit microcontroller 78K0s series: this is the actual controller chip, actually a 'secure' version of the standard microcontroller. this holds the code that controls the code hopping algorithm as well as the individual ID codes for each transmitter.
2. RF front end decoder chip: this is a custom chip that takes the signal direct from the antenna and does IF filtering as well as decoding and then supplies a serial data output for the microcontroller
3. NEC 8 bit microcontroller 78K0s series: this is the actual controller chip, actually a 'secure' version of the standard microcontroller. this holds the code that controls the code hopping algorithm as well as the individual ID codes for each transmitter.
Junior Member
Joined: Nov 2008
Posts: 21
Likes: 0
From: South Texas
c230 2005 kompressor
