sm5302a Nippon Precision Circuits Inc, (NPC), sm5302a Datasheet - Page 16

• Manufacturer Part Number: sm5302a
• Description: 3-channel Video Buffer With Built-in Wideband Lpf
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

(7) Filter bypass mode
(8) Maximum number of slave addresses
Register name: CONDITION2
Flag name: NCA
The NCA flag sets the maximum number of slave addresses to either 2 or 3. The NCA setting modifies the
ADS input pin equivalent circuit as shown below.
When NCA = LOW (max = 2), switches SW31 to SW33 are OFF, reducing the current consumed in com-
parison to when NCA = HIGH (max = 3). Note that only 2 ADS input levels (LOW or HIGH) are valid.
When NCA = HIGH (max = 3), switches SW31 to SW33 are ON and hence current is consumed regardless
of whether the ADS input is LOW, HIGH, or Open. However, note that 3 ADS input levels are valid.
Note. The default value for NCA is HIGH (max = 3). If NCA is once set to LOW (max = 2) for a device
Register name: CONDITION2
Flag name: BYPASS
This flag allows the lowpass filter to be bypassed. The output gain can be switched, even in filter bypass
mode. The input type, multiplexer function, and output gain can all be set just as in filter mode. However,
the cutoff frequency and fc mode settings have no effect on the outputs.
Flag name
NCA
addressed by the setting when ADS is Open, that device is subsequently no longer accessible.
H
Flag name
L
BYPASS
H
L
Maximum number of
(2-address mode)
(3-address mode)
slave address
2
3
ADS
(signals pass through lowpass filter)
(signals bypass lowpass filter)
Filter bypass mode
Filter mode
SW31
Filter
Default
SW21
SW32
SM5302A
NCA=2
NCA=3
SW33
ADS level
HIGH
Open
HIGH
Open
LOW
LOW
NCA=L(2)
NCA=H(3)
I C Control
2
Slave address
Default
Address
decoder
1001000
1001001
1001000
1001001
1001010
Invalid
SEIKO NPC CORPORATION —16
current flow
ADS pin
Yes
No