CY8C9520A-24PVXI Cypress Semiconductor Corp, CY8C9520A-24PVXI Datasheet - Page 10

• Manufacturer Part Number: CY8C9520A-24PVXI
• Description: IC I/O EXPANDER I2C 20B 28SSOP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY8C9520A-24PVXI

• Package / Case: 28-SSOP
• Interface: I²C
• Number Of I /o: 20
• Interrupt Output: Yes
• Frequency - Clock: 100KHz
• Voltage - Supply: 3 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Includes: EEPROM, POR, PWM, WDT
• Processor Series: CY8C95x0A
• Core: M8C
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 20
• Operating Supply Voltage: 3 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: CY3242-IOX, CY3242-IOXLite
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Program Memory Type: EEPROM
• Program Memory Size: 32 KB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 428-2023 - KIT EVAL PSOC I2C PORT EXP428-1911 - KIT EVAL PSOC I2C PORT EXP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 428-2015-5

Document Number: 38-12036 Rev. *E
Start
Start
S A6 A5
S A6 A5
Start
Start
S
S
Slave Address
A6 A5
Slave Address
A6 A5
A4
A4
A3 A2 A1 A0 0
A3 A2 A1 A0 0
Slave Address
Slave Address
A4
A4
A3 A2 A1 A0
A3 A2 A1 A0
R/W
R/W
ACK from
ACK from
Slave
Slave
A
A
R/W
ACK from
R/W
0
ACK from
0
Slave
Slave
High(Addr)
High(Addr)
A
A
Memory Address
0
Memory Address
0
Figure 7. Port Reading and Writing in Multi-Port Device
Register Address = 1
Register Address = 09h
0
0
ACK from
ACK from
Slave
0
Slave
0
A
A
0
Reading from EEPROM
0
Low(Addr)
0
Low(Addr)
Figure 6. Memory Reading and Writing
1
Writing to EEPROM
0
Reading from GPort 1
0
Writing from GPort 1
0
0
ACK from
ACK from
ACK from
1
ACK from
Slave
Slave
1
Slave
Slave
A
A
A
A
S A6 A5
S
data from GPort1
data 1
A6 A5
performs output to GPort 1
At this moment, device
Up to the End of Address Space
A4
A4
A3 A2 A1 A0 1
A
A3 A2 A1 A0
A
performs reading from GPort 1
data 2
data from GPort 2
At this moment, device
R/W
R/W
ACK from
ACK from
1
Slave
Master
A
A
A
Output to GPort 2
data from GPort1
ACK from
data(Addr)
Slave
A
...
data from GPort 3
Reading from GPort 2
ACK from
Master
CY8C9540A, CY8C9560A
A
A
Stop
A data from GPort 2 A
P
data(Addr+1)
Output to GPort 3
If current address crosses
then device performs real
64-byte block boundary,
writing to EEPROM
ACK from
Slave
A
ACK from
Master
A
...
Stop
...
P
CY8C9520A
from Master
Page 10 of 32
No ACK
...
N
Stop
from Master
No ACK
P
N
Stop
P
[+] Feedback