PT7C4337WEX Pericom Semiconductor, PT7C4337WEX Datasheet - Page 15

• Manufacturer Part Number: PT7C4337WEX
• Description: IC REAL TIME CLK/CALENDAR 8-SOIC
• Manufacturer: Pericom Semiconductor
• Type: Clock/Calendar/Alarmr

Specifications of PT7C4337WEX

• Time Format: Binary
• Date Format: Binary
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: PT7C4337WEXTR

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Slave Address
The I
slave addresses are allocated to each device.
All communications begin with transmitting the [START condition] + [slave address (+ R/W specification)]. The receiving device
responds to this communication only when the specified slave address it has received matches its own slave address.
Slave addresses have a fixed length of 7 bits. See table for the details.
An R/W bit is added to each 7-bit slave address during 8-bit transfers.
I
1) Write via I
PT0205(08/09)
2
C Bus’s Basic Transfer Format
Operation
2
Write
C bus device does not include a chip select pin such as is found in ordinary logic devices. Instead of using a chip select pin,
Read
Start
S
Slave address + write specification
1
2
Slave address (7 bits)
C bus
1
Transfer data
0
Sr
D1 h
D0 h
S
1
0
Start indication
Restart indication
0
0
bit 7
write
1
0
A
A
C
K
bit 6
Address
Specifies the write start address.
1
P
Addr. setting
bit 5
Stop indication
0
Table
Slave address
15
bit 4
1
bit 3
A
A
0
Real-time Clock Module (I
A
A
C
K
RTC Acknowledge
Master Acknowledge
bit
Write data
7
bit 2
bit
0
6
bit
5
bit
4
bit 1
0
bit
3
bit
2
bit
1
0 (= Write)
1 (= Read)
bit
0
Data Sheet
R / W bit
PT7C4337
bit 0
A
C
K
A
2
Stop
P
C Bus)
Ver: 4