MAX7349AEG-T Maxim Integrated, MAX7349AEG-T Datasheet - Page 18

• Manufacturer Part Number: MAX7349AEG-T
• Description: Peripheral Drivers & Components - PCIs Low-EMI Key Switch & Sounder Controller
• Manufacturer: Maxim Integrated

2-Wire Interfaced Low-EMI Key Switch
and Sounder Controllers
Table 12. Configuration Register Format
18
Serial interface bus timeout enabled
Serial interface bus timeout disabled
No active sounder output
Active sounder output set by serial
interface
Active sounder output set by key
debounce event
Active sounder output set by an alert
event
Alert input interrupt (if enabled) is
asserted according to key-scan
interrupt rules
Alert input interrupt (if enabled) is
asserted immediately
Alert input does not cause an
interrupt
Falling edge of alert input causes
interrupt
Alert input does not cause an
automatic sound
Falling edge of alert input causes the
8-bit contents of the alert sound
register 0x07 to be sent to the
sounder
Debounce key(s) do not cause an
automatic sound
Debounced key(s), including
autorepeated keys, cause the 8-bit
contents of the key-sound register
0x06 to be sent to the sounder
CONFIGURATION REGISTER
______________________________________________________________________________________
REGISTER
CODE (hex)
ADDRESS
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
0x04
SHUTDOWN
D7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
ENABLE
SOUND
KEY
D6
X
X
X
X
X
X
X
X
X
X
X
X
0
1
ENABLE
SOUND
ALERT
D5
X
X
X
X
X
X
X
X
X
X
0
1
X
X
REGISTER DATA
ENABLE
ALERT
INT
D4
X
X
X
X
X
X
X
X
0
1
X
X
X
X
ALERT
EVENT
INT
D3
X
X
X
X
X
X
0
1
X
X
X
X
X
X
SOUNDER
D2
STATUS
X
X
0
0
1
1
X
X
X
X
X
X
X
X
D1
X
X
X
X
X
X
X
X
X
X
0
1
0
1
T I M EO U T
EN A B L E
D0
X
X
X
X
X
X
X
X
X
X
X
X
0
1