S-35390A-J8T1G Seiko Instruments, S-35390A-J8T1G Datasheet - Page 30

• Manufacturer Part Number: S-35390A-J8T1G
• Description: IC RTC I2C 2-WIRE 8-SOP
• Manufacturer: Seiko Instruments
• Type: Clock/Calendarr

Specifications of S-35390A-J8T1G

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 728-1006-2

30
2-WIRE REAL-TIME CLOCK
S-35390A
The followings are Read/Write in the S-35390A.
(1) Data Read in S-35390A
After detecting a start condition, the S-35390A receives device code and command. The S-35390A enters the
Read-data mode by the Read/Write bit “1”. The data is output from B7 in 1-byte. Input an acknowledgment signal
from the master device every moment that the S-35390A outputs 1-byte data. However, do not input an
acknowledgment signal (input NO_ACK) for the last data-byte output from the master device. This procedure
notifies the completion of Read. Next, input a stop condition to the S-35390A to finish access.
SDA
SCL
3-byte data
Device code + command
0
1
1
SDA
SCL
1
1-byte data
0
: Input from master device
: Output from S-35390A
0
Figure 34 Example of Data Read 1 (1-Byte Data Register)
Figure 35 Example of Data Read 2 (3-Byte Data Register)
Device code + command
1
: Input from master device
: Output from S-35390A
1
1
0
R/W
1
1
9
B7
1
0
0
Seiko Instruments Inc.
0
0 1
B0
R/W
B7
9
B7
18
Input NO_ACK after the 1st byte
of data has been output.
B0
B0
Input NO_ACK after the 3rd byte of data
has been output.
18
B7
27
B0
36
Rev.3.0
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