BU9929FV Rohm Semiconductor, BU9929FV Datasheet - Page 8

• Manufacturer Part Number: BU9929FV
• Description: IC I/O EXPANDER I2C 16B 28SSOP
• Manufacturer: Rohm Semiconductor

Specifications of BU9929FV

• Interface: I²C
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -15°C ~ 75°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Multimedia ICs
2. Data read mode
According to the following format, input/output value of PIO/PION pins can be read by I
PIO data read
PIO part block diagram
Input Port sampling timing
As shown below, BU9929FV is sampling for Input Ports with the rising edges of CLK.
Therefore it is necessary that Input Ports are keeping at least 1 CLK cycle, for their certain inputs.
Watching Ports
CLK
St SLAVE ADDRESS
IC
PAD
(PIO part block diagram)
R
Input Schmitt
A
READ DATA 1
Output Buffer
F6
Shut Down
PION7 − PION0
C7
I / O select
A
Output Register
Input Register
READ DATA 2
AA
Selector
PIO15 − PIO8
A
Sp
Read Mode
Command D4
Command D3
2
C interface.
I
2
C BUS
BU9929FV
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