BU21023GUL_16 Datasheet, PDF (9/21 Pages) Rohm – Resistive Type Touch Screen Controller ICs

BU21023GUL BU21023MUV BU21024FV-M
EEPROM I/F
(SCL=ECL , SDA=EDA )
BU21023 controllers include an EEPROM interface for firmware download.
Device address of EEPROM is set via register 0x51(EEPROM_ADDR).
Timing Chart
SDA
SCL
tHD;STA
tSU;DAT
Address
ReSad
/WTrite
A
R
T
ACK
Data
ACK
tHD;DAT
Data
ACK
tSU;STO
Condition : VDD = 3.0V Ta=25°C
Parameter
SCL Clock Frequency
START Hold Time
SCL ”L” Width
SCL ”H” Width
Data Hold Time
Data Setup Time
STOP Setup Time
Symbol
fSCL
tHD:STA
tLOW
tHIGH
tHD:DAT
tSU:DAT
tSU:STO
Min
270
0.7
1.4
1.4
0.7
0.7
0.7
Limit
Typ
310
-
-
-
-
-
-
Unit
Max
350
kHz
0.9
µs
1.8
µs
1.8
µs
0.9
µs
0.9
µs
0.9
µs
Condition
Protocol
*IC does not support the write command.
*IC supports the following read command.
Start
S SLAVE ADDRESS
WA
WORD ADDRESS(n)
AS
SLAVE ADDRESS
RA
READ DATA(n)
NP
Stop
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TSZ22111・15・001
9/17
TSZ02201-0L5L0F300840-1-2
7.June.2016 Rev.004