MAX7370 Maxim, MAX7370 Datasheet - Page 9

• 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 1. Register Address Map and Power-Up Conditions (continued)
CODE (hex)
ADDRESS
8 x 8 Key-Switch Controller and LED Driver/GPIOs
0x3A
0x3B
0x3C
0x5A
0x5B
0x38
0x39
0x40
0x42
0x43
0x45
0x48
0x50
0x51
0x52
0x53
0x54
0x55
0x56
0x57
0x58
0x59
2
C Interface and High Level of ESD Protection
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READ/WRITE
Read only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
VALUE (hex)
POWER-UP
0xC0
0x00
0x00
0xFF
0xFF
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0xFF
0xFF
0x00
0x00
GPIO debounce
I
Common PWM
GPIO values 1
GPIO values 2
LED constant-
current setting
2
shifter enable
configuration
configuration
configuration
configuration
configuration
GPIO supply
GPIO supply
GPIO global
C timeout flag
FUNCTION
COL4 PWM
COL5 PWM
COL6 PWM
COL7 PWM
REGISTER
GPIO level-
COL4 LED
COL5 LED
COL6 LED
COL7 LED
GPI trigger
GPI trigger
voltage 1
voltage 2
Interrupt
Interrupt
mode 1
mode 2
mask 1
mask 2
ratio
ratio
ratio
ratio
GPIO voltages supplied by V
ROW7–ROW0
GPIO voltages supplied by V
COL7–COL0
Debounced input or output values of ROW7–ROW0
Debounced input or output values of COL7–COL0
GPIO direct level-shifter pair enable
GPIO global enable, GPIO reset, LED fade enable
ROW7–ROW0 debounce time setting
COL7–COL4 constant-current output setting
Common PWM duty-cycle setting
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COL4 individual duty-cycle setting
COL5 individual duty-cycle setting
COL6 individual duty-cycle setting
COL7 individual duty-cycle setting
COL4 interrupt, PWM mode control, and blink-
period settings
COL5 interrupt, PWM mode control, and blink-
period settings
COL6 interrupt, PWM mode control, and blink-
period settings
COL7 interrupt, PWM mode control, and blink-
period settings
Interrupt mask for ROW7–ROW0
Interrupt mask for COL7–COL0
GPI edge-triggered detection setting for
ROW7–ROW0
GPI edge-triggered detection setting for
COL7–COL0
2
C timeout since last POR
DESCRIPTION
CC
CC
MAX7370
or V
or V
LA
LA
for
for