Datasheet

MAX7315
8-Port I/O Expander with LED Intensity
Control, Interrupt, and Hot-Insertion Protection
22 ______________________________________________________________________________________
Table 14. Output Intensity Registers
REGISTER DATA
REGISTER
ADDRESS
CODE
(HEX)
D7 D6 D5 D4 D3 D2 D1 D0
MSB
LSB
MSB
LSB
OUTPUTS P1, P0 INTENSITY
R/W
OUTPUT P1 INTENSITY OUTPUT P0 INTENSITY
Write output P1, P0 intensity
0
Read back output P1, P0 intensity
1
P1I3
P1I2
P1I1
P1I0
P0I3
P0I2
P0I1
P0I0
Output P1 intensity duty cycle is 1/16
—
0000————
Output P1 intensity duty cycle is 2/16
—
0001————
Output P1 intensity duty cycle is 3/16
—
0010————
—
—
————————
Output P1 intensity duty cycle is 14/16
—
1101————
Output P1 intensity duty cycle is 15/16
—
1110————
Output P1 intensity duty cycle is 16/16
(static logic level, no PWM)
—
1111————
Output P0 intensity duty cycle is 1/16
—
———— 0 0 0 0
Output P0 intensity duty cycle is 2/16
—
———— 0 0 0 1
Output P0 intensity duty cycle is 3/16
—
———— 0 0 1 0
—
—
————————
Output P0 intensity duty cycle is 14/16
—
———— 1 1 0 1
Output P0 intensity duty cycle is 15/16
—
———— 1 1 1 0
Output P0 intensity duty cycle is 16/16
(static logic level, no PWM)
—
0X10
———— 1 1 1 1
MSB
LSB
MSB
LSB
OUTPUTS P3, P2 INTENSITY
OUTPUT P3 INTENSITY OUTPUT P2 INTENSITY
Write output P3, P2 intensity
0
Read back output P3, P2 intensity
1
0x11
P3I3
P3I2
P3I1
P3I0
P2I3
P2I2
P2I1
P2I0
MSB
LSB
MSB
LSB
OUTPUTS P5, P4 INTENSITY
OUTPUT P5 INTENSITY OUTPUT P4 INTENSITY
Write output P5, P4 intensity
0
Read back output P5, P4 intensity
1
0x12
P5I3
P5I2
P5I1
P5I0
P4I3
P4I2
P4I1
P4I0
MSB
LSB
MSB
LSB
OUTPUTS P7, P6 INTENSITY
OUTPUT P7 INTENSITY OUTPUT P6 INTENSITY
Write output P7, P6 intensity
0
Read back output P7, P6 intensity
1
0x13
P7I3
P7I2
P7I1
P7I0
P6I3
P6I2
P6I1
P6I0
OUTPUT O8 INTENSITY See the master, O8 intensity register (Table 13).