ICs for VCR
AN3664NFB
■ Application Notes
• Serial control timing specification
1. Start and stop conditions
Data
tBUF
tLOW
tr
Clock
tHD; STA
tSU; STO
Stop condition Start condition
Stop condition
2. Data recognition condition
Data is
variable.
Stable data line: Valid data
Data
(Pin 17)
tf
tHIGH
Clock
(Pin 16)
t
SU; DAT
tHD; DAT
3. Recommended operation condition
Parameter
Symbol
Min Max Unit
Bus free time between stop and start conditions
tBUF
4.7
4.0
µs
µs
Hold time start condition
tHD; STA
(First clock pulse is generated after this period.)
Clock low state hold time
Rise time of data and clock signals
Setup time of stop condition
Data setup time
tLOW
tr
4.7
µs
ns
1 000
tSU; STO
tSU; DAT
tHIGH
4.0
250
4.0
µs
ns
Clock high state hold time
Fall time of data and clock signals
Data hold time
µs
tf
300
100
ns
tHD; DAT
fSCL
5.0
0
µs
Clock frequency
kHz
19
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