S-35390A-J8T1G Seiko Instruments, S-35390A-J8T1G Datasheet - Page 32

• 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

32
2-WIRE REAL-TIME CLOCK
S-35390A
4. Data access
(1) Real-time data 1 access
(2) Real-time data 2 access
(3) Status register 1 access and status register 2 access
*1. Set NO_ACK = 1 in Read.
*2. Transmit ACK = 0 from the master device to the S-35390A in Read.
*1. Set NO_ACK = 1 in Read.
*2. Transmit ACK = 0 from the master device to the S-35390A in Read.
*1. 0 : Status register 1 selected, 1 : Status register 2 selected
*2. Set NO_ACK = 1 for reading.
SDA
SCL
SDA
SCL
I/O mode switching
Figure 40 Status Register 1 Access and Status Register 2 Access
I/O mode switching
0
Device code +
1
1
SDA
0
SCL
command
Device code +
1
1
1
command
I/O mode switching
0
1
0
0
1
0
0
1
Figure 38 Real-Time Data 1 Access
Figure 39 Real-Time Data 2 Access
1
0
R/W
Device code +
1
1
9
command
B7
R/W
1
9
Year data
B7
0
Seiko Instruments Inc.
*1
0
Hour data
0
B0
I/O mode switching
B0
R/W
9
B7
I/O mode switching
18
Status data
18
B7
Minute data
B0
I/O mode switching
18
B0
27
B7
Second data
63
B7
Second data
B0
B0
36
72
Rev.3.0
_00