Waveshare 4.2inch e-Paper V2 User Manual page 15

Write mode
Symbol
fSCL SCL frequency (Write Mode)
tCSSU Time CS# has to be low before the first rising edge of SCLK
Time CS# has to remain low after the last falling edge of
tCSHLD
SCLK
tCSHIGH Time CS# has to remain high between two transfers
tSCLHIGH Part of the clock period where SCL has to remain high
tSCLLOW Part of the clock period where SCL has to remain low
Time SI (SDA Write Mode) has to be stable before the next
tSISU
rising edge of SCL
Time SI (SDA Write Mode) has to remain stable after the next
tSIHLD
rising edge of SCL
Read mode
Symbol
fSCL SCL frequency (Read Mode)
tCSSU Time CS# has to be low before the first rising edge of SCLK
Time CS# has to remain low after the last falling edge of
tCSHLD
SCLK
tCSHIGH Time CS# has to remain high between two transfers
tSCLHIGH Part of the clock period where SCL has to remain high
tSCLLOW Part of the clock period where SCL has to remain low
Time SO (SDA Read Mode) will be stable before the next
tSOSU
rising edge of SCL
Time SO (SDA Read Mode) remain stable after the next
tSOHLD
rising edge of SCL
Note: All timing are based on 20% to 80% of VDDIO-VS.
Parameter
Parameter
12
4.2inch e-Paper V2
User Manual
Min. Typ. Max. Unit
- - 20
TBD - -
TBD - -
TBD - -
TBD - -
TBD - -
TBD - -
TBD - -
Min. Typ. Max. Unit
- - 2.5
TBD - -
TBD - -
TBD - -
TBD - -
TBD - -
TBD TBD -
TBD TBD -
MHZ
ns
ns
ns
ns
ns
ns
ns
MHZ
ns
ns
ns
ns
ns
ns
ns