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CXP-85232A View Datasheet(PDF) - Sony Semiconductor

Part NameDescriptionManufacturer
CXP-85232A CMOS 8-bit Single-chip Microcomputer Sony
Sony Semiconductor Sony
CXP-85232A Datasheet PDF : 20 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
CXP85112B/85116B, CXP85220A/85224A/85228A/85232A
(6) I2C bus timing
(Ta = –20 to +75°C, VDD = 4.5 to 5.5V, Vss = 0V reference)
Item
Symbol
Pins
Conditions Min.
Max. Unit
SCL clock frequency
fSLC
SCL
0
100 kHz
Bus free time prior to transfer start
tBUF
SDA, SCL
4.7
µs
Transfer start hold time
tHD; STA
SDA, SCL
4.0
µs
Clock Low level width
tLOW
SCL
4.7
µs
Clock High level width
tHIGH
SCL
4.0
µs
Setup time during repetitive transfer
tSU; STA
SDA, SCL
4.7
µs
Data hold time
tHD; DAT
SDA, SCL
01
µs
Data setup time
tSU; DAT
SDA, SCL
250
ns
SDA, SCL rise time
tR
SDA, SCL
1
µs
SDA, SCL fall time
tF
SDA, SCL
300 ns
Transfer end setup time
tSU; STO
SDA, SCL
4.7
µs
1 The data hold time does not take into consideration SCL rise time (300ns max.). Ensure that the data hold
time exceeds 300ns.
SDA
SCL
tBUF
tR
tF
tHD; STA
tHD; STA
P
S
tLOW
tHD; DAT
tHIGH
tSU; DAT
tSU; STA
St
tSU; STO
P
Fig. 9. I2C bus transfer timing
I2C device I2C device
RS
RS RS
RS RP
RP
SDA0
(or SDA1)
SCL0
(or SCL1)
Fig. 10. Recommended circuit example for I2C device
Pull-up resistors (RP) must be connected to SDA0 (or SDA1) and SCL0 (or SCL1).
Serial resistance (Rs = 300and under) of SDA0 (or SDA1) and SCL0 (or SCL1) reduces spike noise
caused by CRT flashover.
– 16 –
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