MAX7370 Maxim, MAX7370 Datasheet - Page 31

• Manufacturer Part Number: MAX7370
• Description: The MAX7370 I²C-interfaced peripheral provides microprocessors with management of up to 64 key switches, with optional GPIO and PWM-controlled LED drivers
• Manufacturer: Maxim

with I
Table 26. LED Constant-Current Setting Register (0x43)
Table 27. Common PWM Register (0x45)
Table 28. I
Power-up default setting
Common PWM ratio is 0/256
Common PWM ratio is 1/256
Common PWM ratio is 2/256
Common PWM ratio is 3/256
Common PWM ratio is 252/256
Common PWM ratio is 253/256
Common PWM ratio is 254/256
Common PWM ratio is 256/256 (100% duty cycle)
REGISTER BIT
REGISTER BIT
8 x 8 Key-Switch Controller and LED Driver/GPIOs
D[7:6]
D[5:1]
D[7:1]
D0
D0
2
2
REGISTER DESCRIPTION
C Timeout Flag Register (0x48) (Read Only)
C Interface and High Level of ESD Protection
���������������������������������������������������������������� Maxim Integrated Products 31
Constant-current
I
DESCRIPTION
DESCRIPTION
2
C timeout flag
Reserved
Reserved
Reserved
setting
0000000
VALUE
VALUE
00000
11
0
1
0
1
Set always as 11
—
Constant current is 20mA
Constant current is 10mA
—
No I
POR.
I
This bit is reset to zero when a read is performed
on this register. I
this function to work (see Table 8).
2
C timeout has occurred since last read or POR.
2
C timeout has occurred since last read or
D7
0
0
0
0
1
1
1
1
⋮
D6
0
0
0
0
1
1
1
1
2
C timeouts must be enabled for
FUNCTION
FUNCTION
D5
0
0
0
0
1
1
1
1
REGISTER DATA
COMMON PWM
D4
0
0
0
0
1
1
1
1
D3
0
0
0
0
1
1
1
1
MAX7370
D2
0
0
0
0
1
1
1
1
DEFAULT VALUE
DEFAULT VALUE
0000000
D1
0
0
1
1
0
0
1
1
00000
11
0
0
D0
0
1
0
1
0
1
0
1