MAX7360_11 Datasheet, PDF (29/32 Pages) Maxim Integrated Products – I2C-Interfaced Key-Switch Controller and LED

I²C-Interfaced Key-Switch Controller and LED
Driver/GPIOs with Integrated ESD Protection
Table 24. PORT0–PORT7 Individual PWM Ratio Registers (0x50 to 0x57)
REGISTER DESCRIPTION
REGISTER DATA
D7
D6
D5
D4
D3
D2
D1
D0
PORT PWM
Power-up default setting (port PWM ratio is
0/256)
0
0
0
0
0
0
0
0
PORT PWM ratio is 1/256
PORT PWM ratio is 2/256
PORT PWM ratio is 3/256
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
1
.
.
.
PORT PWM ratio is 252/256
1
1
1
1
1
1
0
0
PORT PWM ratio is 253/256
1
1
1
1
1
1
0
1
PORT PWM ratio is 254/256
1
1
1
1
1
1
1
0
PORT PWM ratio is 256/256 (100% duty cycle)
1
1
1
1
1
1
1
1
Table 25. PORT0–PORT7 Configuration Registers (0x58 to 0x5F)
REGISTER
BIT
DESCRIPTION
D7
Interrupt mask
D6
Edge/level
detect
D5
Common PWM
D[4:2]
Blink period
D[1:0]
Blink-on time
VALUE
0
1
0
1
0
1
000
001
010
011
100
101
110/111
00
01
10
11
FUNCTION
Interrupt is not masked
Interrupt is masked. PORT7 interrupt mask is ignored when the
device is configured for rotary switch input.
Rising edge-triggered
interrupts
Rising or falling edge-
triggered interrupts
Interrupts only occur when the GPIO port
is configured as an input
Port uses individual PWM intensity register to set the PWM ratio
Port uses common PWM intensity register to set the PWM ratio
Port does not blink
Port blink period is 256ms
Port blink period is 512ms
Port blink period is 1024ms
Port blink period is 2048ms
Port blink period is 4096ms
Undefined
LED is on for 50% of the blink period
LED is on for 25% of the blink period
LED is on for 12.5% of the blink period
LED is on for 6.25% of the blink period
DEFAULT
VALUE
0
0
0
000
00
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