BU9929FV
Multimedia ICs
1/11
I
2
C BUS interface, general purpose I/O
ports with condition watching function
BU9929FV
ROHM's GPIO is a general-purpose IO that contains I
2
C BUS interface. It also contains monitoring function that conveys
a change of the signal level in terminal to the host system via interrupt terminal or I
2
C BUS.
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Applications
Notebook PC, PC, VCR, TV etc. and other systems with I
2
C BUS.
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Features
1) I
2
C BUS interface
2) General purpose I/O port 16bits
3) State monitoring function to monitor all terminals
4) State detection signal serial output by I
2
C BUS master function
5) Output port of state detection signal
6) State detection ON/OFF setting input port during the default status
7) 32.768kHz clock input
8) Power supply voltage 3.3V / 5.0V
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Absolute maximum ratings (Ta=25
C)
Parameter
Symbol
Limits
Unit
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Terminal supply voltage
V
DD
Pd
Topr
Tsig
V
IN
7.0
640
-
15 to +75
-
55 to +125
GND
-
0.5 to V
DD
+0.5
V
mW
C
C
V
Temperature derating : 6.4mW/C over Ta=25C
Radiation resistance is not included in the design.
Rohm CO., Ltd is a licensee of I
2
C BUS from Philips Semiconductors.
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Recommended operating conditions (Ta=25
C)
Parameter
Min.
Typ.
Max.
Unit
Operating supply voltage range
-
5.5
3.0
V
BU9929FV
Multimedia ICs
2/11
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Block diagram
TIMING
GENERATOR
TIMING
CONTROLLER
I
2
C BUS
INTERFACE
DATA LATCH
BLOCK
SLAVE ADDRESS 2 BITS
#RES
CLK
SDA
SCL
AD0
AD1
DS
PION0
PION1
PION7
PIO8
PIO15
INT
DEFAULT STATUS
PIO BUFFER
EDGE DETECT
BLOCK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SCL
SDT
DS
TEST0
PION0
PION1
PION2
PION3
PION4
PION5
PION6
INT
PION7
GND
AD0
AD1
TEST1
PIO8
PIO9
PIO10
PIO11
PIO12
PIO13
PIO14
PIO15
RESB
CLK
V
DD
BU9929FV
Multimedia ICs
3/11
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Pin description
Pin. No
Pin. Name
I/O circuit
Pin Description
1
2
3
5-11,13
18-25
26
SCL
SDT
DS
PION
PIO
14
GND
RES#
I
2
C BUS Input/Output terminal
To set condition detection mode
at default state
Reset terminal
Reset condition by "L" input
GND terminal
Standard input/output terminal. Input at
TTL level.
This waits for condition detection function
of input. Output will be Hi-Z at Shut Down
mode.
Nch open drain standard input/output
terminal. Input at TTL level.
This waits for condition detection function
of input.
Output will be Hi-Z at Shut Down mode.
5V input is possible when this IC is
operated by 3.3V.
BU9929FV
Multimedia ICs
4/11
Pin. No
Pin. Name
I/O circuit
Pin Description
12
27
15
16
4
28
INT
CLK
AD0
AD1
TEST0
17
TEST1
V
DD
Output terminal for condition change
detection.
Nch open drain output.
Clock input terminal.
32.768KHz should be put.
At Shut Down mode, clock supply into
this IC will be shut down.
Power terminal.
3.3V/5.0V should be put in.
IC TEST Pin.
"L" Input required for normal operation.
IC TEST Pin.
"L" Input required for normal operation.
Input terminal for setting of I
2
C BUS
Slave address lower 2 bits.
BU9929FV
Multimedia ICs
5/11
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Electrical characteristics (Unless otherwise noted, V
DD
=5.0V, Ta=25
C)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Test Pin No.
Circuit current (Normal)
Circuit current (Shut down mode)
"H" Level input voltage 1
"L" Level input voltage 1
"H" Level input voltage 2
"L" Level input voltage 2
"H" Level input voltage 3
"H" Level input Current
"L" Level input Current
"H" Level output voltage
"L" Level output voltage 1
"L" Level output voltage 2
I
2
C Fall time
I
DD
I
DS
V
IH1
V
IL1
V
IH2
V
IL2
V
IH3
I
IH
I
IL
V
SOH
V
SOL
V
COL
TFIC
-
-
V
DD
0.7
-
0.5
2.5
-
0.5
2.5
2.0
-
1.0
4.4
0.0
0.0
-
6.0
0.1
V
DD
0.0
V
DD
0.0
V
DD
0.0
0.0
4.8
0.2
0.2
100
30
2.0
V
DD
+
0.5
V
DD
0.3
V
DD
+
0.5
0.8
5.5
1.0
-
5.0
0.6
0.6
250
A
A
V
V
V
V
V
A
A
V
V
V
ns
CLK=32.768Hz
Shut Down Mode
I
OH
=4mA
I
OL
=4mA
I
OL
=6mA
I
OL
=6mA
CL=400pF
28
28
1, 2
1, 2
1, 2
1, 2
3, 4, 15-17
5-11, 13
18-25
5-13, 18-25
3-5, 11, 13
15-27
3-5, 11, 13
15-27
3-5, 11, 13
15-27
BU9929FV
Multimedia ICs
6/11
I
2
C BUS Interface characteristics (Unless otherwise noted, V
DD
=5.0V, Ta=25
C)
Slave address
0
MSB
LSB
1
1
1
1
A1
A0
R / W
A0 and A1 are set by input terminals of AD0 and AD1 as follows;
When AD0 / AD1=H, A0 / A1=1
When AD0 / AD1=L, A0 / A1=0
Conforming to I
2
C BUS standard
Parameter
Symbol
Min.
Unit
SCL clock frequency
Start condition hold time
Start condition set-up time
Data set-up time
Data hold time
Stop condition set-up time
f SCL
t HD : STA
t SU : STA
t SU : DAT
t HD : DAT
t SU : STO
0
0.6
0.6
100
0
0.6
Max.
400
-
-
-
0.9
-
kHz
s
s
ns
s
s
t SU : STA
t HD : STA
SCL
SDA
(Start Timing)
t SU : DAT
t HD : DAT
SCL
SDA
(Data Timing)
t SU : STO
SCL
SDA
(Stop Timing)
BU9929FV
Multimedia ICs
7/11
1. Data write mode
St SLAVE ADDRESS W
A COMMAND BYTE A
WRITE DATA 1
PION7
-
PION0
PIO15
-
PIO8
A
A
Sp
WRITE DATA 2
Command register : At reset, D0 to D7 are "0".
D7
SHT DWN
D6
INT SEL
D5
DOUT SEL
D4
OUT ON
D3
DIR ON
D2
BYTE SEL
D1
EDGE SEL
D0
DET ON
D7 : Shut Down mode
0 : Shut down mode off (Normal operation mode)
1 : Shut down mode on
D6 : INT output method choice
0 : LOW output
1 : Output of LOW pulse equivalent for one period of CLK
D5 : Detection result output choice
0 : Serial output. INT pin is also valid.
1 : Serial output (I
2
C MASTER function) off. Only INT pin is valid.
D4 : Output port writing set
0 : Writing invalid
1 : Writing valid. But, a port, which is indicated as input, is invalid.
Following Write data 2byte-0 : "L" output, 1 : "H" output
D3 : I / O direction set
0 : Direction set invalid
1 : Direction set valid
Following Write data 2byte-0 : input, 1 : output
D2 : Watching object input choice
0 : PION0 to PION7
1 : PION8 to PIO15
D1 : Change detection mode
0 : Falling edge
1 : Both rising and falling edge
D0 : Input port condition watching mode
0 : Invalid
1 : Valid
BU9929FV
Multimedia ICs
8/11
2. Data read mode
According to the following format, input/output value of PIO/PION pins can be read by I
2
C interface.
PIO data read
St SLAVE ADDRESS
R
A
READ DATA 1
A
READ DATA 2
A
Sp
PION7
-
PION0
PIO15
-
PIO8
PIO part block diagram
Output Register
Command D4
I
2
C BUS
Command D3
Read Mode
Selector
Shut Down
Input Register
Input Schmitt
IC
PAD
I / O select
(PIO part block diagram)
Output Buffer
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
AA
F6
C7
BU9929FV
Multimedia ICs
9/11
3.Condition change detection result output mode
1) This IC becomes I
2
C master device, and the detection result is sent according to the following format;
2Byte Watching
St
0 0 0 1 0 0 0
W
A
SLAVE ADDRESS
+
0
A
WRITE DATA 1
A
A
Sp
WRITE DATA 2
PION7
-
PION0
PIO15
-
PIO8
1Byte Watching
St
0 0 0 1 0 0 0
W
A
SLAVE ADDRESS
+
0
A
WRITE DATA 1
A
Sp
PION7
-
PION0
<DATA Keeping Operation>
In a case that there is a change in detection port during detection result transmission, then watching data is saved by the
end of detection output, and it will be proceeded further after the detection output is finished.
However, the output data in this case will be "AND" output of every bits of the watching data.
Watching Ports
Output for I
2
C BUS
FE
FC
F0
F8
FE
FC
F0
AND Output of every bits of
the watching data
In the case of Arbitration;
Output is delayed
2) DS pin Description
By DS pin, valid/invalid of condition detection of the default condition (from RESET release to reception of the first I
2
C
command) can be set.
<DS pic valid range>
In the range from RESET release to the first set of condition detection mode by I
2
C command, the set of this pin will be
valid. After the set of condition detection mode by I
2
C command, this pin will be invalid, and the set by I
2
C commanded
will be reflected.
<Pin setting>
DS pin= "H" : Input bit condition detection mode is valid.
But, 1 byte detection mode (only PION7-PION0 will be in condition detection)
DS pin="L" : Input bit condition detection mode is invalid.
BU9929FV
Multimedia ICs
10/11
3INT pin specification
When condition watching mode, INT output pin works for reporting of detection of watching port.
(a) When command D6=0(including default time after RESET release)
INT pin falls when detection of watching port is received. And INT pin rises after ACK-output which is on the I
2
C Data
read.
Watching Ports
Output for I
2
C BUS
CLK
INT OUTPUT
F8
St
SLAVE ADDRESS
OUTPUT "F8"
A
In the case that there is a change in detection ports once, and there are another changes before returning the ACK (as
shown "A term"), then watching data is saved. And the output data in this case will be "AND" output of every bits of the
watching data.
Watching Ports
Output for I
2
C BUS
CLK
INT OUTPUT
C7
A4
F6
St
SLAVE ADDRESS
" A term"
OUTPUT "84"
OUTPUT "84hex data" which
is the result of AND data
for "F6", "C7" and " A4".
A
R
BU9929FV
Multimedia ICs
11/11
(b) When command D6=1
INT pin outputs "I clock cycle pulse" when detection of watching port is received. In the case that the output data is the
data whish is sampled immediately before the returning ACK.
Watching Ports
Output for I
2
C BUS
CLK
INT OUTPUT
AA
78
CLK 1 cycle pulse
St
SLAVE ADDRESS
OUTPUT "AA"
Data "78h" is not kept, the
output data is immediately
before sampled data.
A
R
4. Shut down mode
By command D7=1, this IC can be set to Shut down mode, which can save current consumption. At Shut down mode,
operation of CLK input pin will be stopped, and input of CLK into this IC can be shut down. Also, for every PIO/PION pins,
pins under output condition will be saved as Hi-Z.
At Shut down mode, condition-watching function can not be used.
Contents of each register before shut down will be saved by the shut down release.
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External dimensions (Unit : mm)
SSOP-B28
0.1
0.15
0.1
0.1
1.150.1
1
0.65
7.60.3
5.60.2
28
10.00.2
0.3Min.
14
15
0.220.1
Appendix
Appendix1-Rev1.0
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
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